The document provides an overview of JScript, including:
- Differences between JScript, JavaScript, and VBScript. JScript is Microsoft's version of JavaScript.
- JScript versions implemented by different Microsoft applications and browsers over time.
- JScript is an interpreted scripting language used to build dynamic web pages and applications.
- Topics to be covered in training on JScript fundamentals and programming techniques.
- Examples of basic JScript code and how to compile and run JScript applications.
JavaScript is a programming language that can be embedded in HTML pages and used to create dynamic web page content. It allows interacting with browsers by opening windows, submitting forms, and loading URLs. JavaScript code can appear between <script> tags in HTML files or in external .js files linked via the src attribute. The browser runs the JavaScript interpreter to execute the code as pages load. Core JavaScript defines syntax rules while client-side JavaScript is used in browsers to interact with HTML content.
1) The document discusses JavaScript and how it can be used to enhance web pages.
2) JavaScript code is written within HTML documents using <script> tags and can reference built-in browser objects like document.
3) JavaScript supports variables, arrays, functions, conditional statements, and loops to add interactivity to web pages.
This document provides an overview of JavaScript. It discusses that JavaScript is an object scripting language used to create dynamic online content. It can be used by HTML authors to dynamically script page behavior on both the client-side and server-side. The document then covers basic JavaScript structures like using the <SCRIPT> tag to embed scripts in HTML and external scripts. It also discusses data types in JavaScript, variable declaration, and other syntax conventions.
This document provides a tutorial on VBScript syntax and features. It begins with an overview of VBScript, including its history, uses, and advantages. It then covers VBScript syntax elements like whitespace, formatting, comments, and reserved words. Multiple code examples are provided to demonstrate different syntax structures. The tutorial also introduces basic VBScript programming concepts like variables, operators, decisions, loops, and functions.
The document provides an introduction to JavaScript and jQuery. It discusses what JavaScript and jQuery are, how to add them to web pages, and basic syntax and concepts for both languages. It also covers selecting elements with jQuery, attaching events to elements, and responding to events by performing actions. The document is intended to teach the basics of JavaScript and get readers started with jQuery.
VBScript is a scripting language developed by Microsoft that is used to add interactivity to web pages. It can be run on both the client-side in a web browser using HTML and on the server-side using ASP. VBScript is easy to learn and use, supports variables, constants, operators, and basic decision structures like if/else statements. While it is only supported in Internet Explorer, it remains a useful scripting language for adding interactivity to web pages.
Over 200 Pages of resources and code snippets to learn JavaScript and JavaScript DOM manipulation. JavaScript is the most popular web programming language and this eBook will help you learn more about JavaScript Coding
JavaScript is a programming language that can be embedded in HTML pages and used to create dynamic web page content. It allows interacting with browsers by opening windows, submitting forms, and loading URLs. JavaScript code can appear between <script> tags in HTML files or in external .js files linked via the src attribute. The browser runs the JavaScript interpreter to execute the code as pages load. Core JavaScript defines syntax rules while client-side JavaScript is used in browsers to interact with HTML content.
1) The document discusses JavaScript and how it can be used to enhance web pages.
2) JavaScript code is written within HTML documents using <script> tags and can reference built-in browser objects like document.
3) JavaScript supports variables, arrays, functions, conditional statements, and loops to add interactivity to web pages.
This document provides an overview of JavaScript. It discusses that JavaScript is an object scripting language used to create dynamic online content. It can be used by HTML authors to dynamically script page behavior on both the client-side and server-side. The document then covers basic JavaScript structures like using the <SCRIPT> tag to embed scripts in HTML and external scripts. It also discusses data types in JavaScript, variable declaration, and other syntax conventions.
This document provides a tutorial on VBScript syntax and features. It begins with an overview of VBScript, including its history, uses, and advantages. It then covers VBScript syntax elements like whitespace, formatting, comments, and reserved words. Multiple code examples are provided to demonstrate different syntax structures. The tutorial also introduces basic VBScript programming concepts like variables, operators, decisions, loops, and functions.
The document provides an introduction to JavaScript and jQuery. It discusses what JavaScript and jQuery are, how to add them to web pages, and basic syntax and concepts for both languages. It also covers selecting elements with jQuery, attaching events to elements, and responding to events by performing actions. The document is intended to teach the basics of JavaScript and get readers started with jQuery.
VBScript is a scripting language developed by Microsoft that is used to add interactivity to web pages. It can be run on both the client-side in a web browser using HTML and on the server-side using ASP. VBScript is easy to learn and use, supports variables, constants, operators, and basic decision structures like if/else statements. While it is only supported in Internet Explorer, it remains a useful scripting language for adding interactivity to web pages.
Over 200 Pages of resources and code snippets to learn JavaScript and JavaScript DOM manipulation. JavaScript is the most popular web programming language and this eBook will help you learn more about JavaScript Coding
JavaScript is a scripting language that can be used to make web pages interactive. It allows you to check and modify HTML forms, change images, and write dynamic content. JavaScript code is executed by the browser and only affects the current page. The language is case sensitive, lightweight, and interpreted rather than compiled. Variables, literals, objects, operators, control structures, and functions are the basic components of JavaScript code. Comments can be added to explain code. JavaScript code can be embedded directly in HTML pages or linked via external .js files. Code placement in the head or body affects when it runs.
- JavaScript is a client-side scripting language used to make web pages dynamic. It is embedded in HTML and runs in web browsers.
- JavaScript code can be placed inline in HTML, in <script> tags in the <head> or <body>, or linked via external .js files.
- The document covers JavaScript syntax, data types, string operations, functions, form validation, and examples of alerts, prompts, and calculating sums.
The document provides information on JavaScript fundamentals including:
- JavaScript is an object-oriented scripting language used to make web pages interactive. It was originally called LiveScript and developed by Netscape.
- JavaScript can be used for both client-side scripting in web browsers and server-side scripting using Node.js. It is an interpreted language that is loosely typed, prototype-based, and supports operators, control structures, and functions.
- Common uses of JavaScript include form validation, dynamic updating of content, and basic interactivity on web pages. It works with HTML and CSS to create dynamic web pages.
JavaScript events allow code to run in response to user actions or changes to the document. Common events include onclick which fires when the user clicks an element, and onload which fires when a page finishes loading. JavaScript code is associated with events using HTML event handler attributes or by registering event listeners in the code. Events help make pages dynamic and interactive by triggering JavaScript functions in response to user input.
This document provides an introduction to JavaScript. It defines JavaScript as a lightweight, interpreted programming language that allows adding interactivity to HTML pages. Some key points covered include:
- JavaScript advantages like less server interaction and immediate feedback.
- JavaScript limitations like not allowing file reading/writing.
- The Document Object Model (DOM) represents the HTML document when loaded into a browser as a document object that provides access to all node objects.
- Common JavaScript operators, conditional statements, and built-in objects like Math, Date, String, and Window are described. Form validation using JavaScript is also discussed.
This document provides an introduction to JavaScript, including:
- JavaScript is a scripting language used to programmatically access computational objects in a host environment and is prototype-based and dynamically typed.
- It was initially created by Netscape in 1995 under the name LiveScript and later renamed to JavaScript.
- JavaScript implementations have three main parts - the core ECMAScript language, the Document Object Model (DOM) for manipulating HTML/XML documents, and the Browser Object Model (BOM) for accessing browser capabilities.
- The DOM represents documents as nodes that can be traversed and manipulated, with levels that have added functionality over time. The BOM allows manipulating browser windows and accessing information about the browser, screen,
This document discusses AngularJS, a JavaScript framework. It provides an overview of AngularJS, describing it as a structural framework for dynamic web apps led by Google that uses HTML as a template language. It also outlines some key features of AngularJS like its MVC architecture, two-way data binding, support for unit testing, and use of plain JavaScript objects. Popular companies that use AngularJS are also listed.
Microsoft Typescript is a statically typed compiled language to clean and a simple plain old JavaScript code which runs on any browser, in Node.js or in any JavaScript engine that supports ECMAScript 3 (or newer).
JavaScript is a scripting language that adds interactivity to HTML pages. It works in all major browsers and is used to build dynamic web pages. JavaScript can react to events, modify HTML elements, validate forms, detect browsers, and write cookies. It is commonly placed in <script> tags within HTML pages or linked via external .js files. Comments are added to explain JavaScript code and prevent execution.
This document provides an overview of JavaScript including:
- JavaScript is an interpreted programming language that allows adding interactivity to HTML pages.
- It is commonly used for client-side scripting of web pages in browsers.
- Core JavaScript concepts like variables, data types, operators, and functions are introduced.
- Different types of loops in JavaScript like for, for/in, while and do/while loops are explained.
- Best practices for including JavaScript code in HTML files using <script> tags are covered.
Introduction to TypeScript by Winston LeviWinston Levi
TypeScript is a superset of JavaScript that compiles to JavaScript. It adds optional static typing, classes, and interfaces to JavaScript to help catch errors. TypeScript code is converted to JavaScript at compile time. There are three versions of ECMAScript that TypeScript works with - ES3, ES5, and ES6. TypeScript allows for both static and dynamic typing through features like type declarations and generics.
Java Script is one of the most pervasive languages found on the internet and World Wide Web. Java Script is useful in making web pages more interactive. The pages can be made to react to the actions of the users in the form of special effects, both visual and otherwise.
The document provides an overview of JavaScript including its history, uses, and how to implement it. Some key points covered include:
- JavaScript was originally created by Netscape under the names Mocha and LiveScript, and is now known as ECMAScript. It is an interpreted scripting language that can be added to HTML pages or linked via external files.
- JavaScript can be used to make web pages more dynamic by manipulating HTML objects, validating forms, detecting browsers, and handling events. It runs in the browser rather than on the server.
- The document discusses different ways of implementing JavaScript including embedding it directly in HTML, linking external .js files, and issues around browser compatibility.
-
JavaScript Roadmap - The Basics event presentation covers:
- JavaScript Applications
- History of JavaScript
- Basics of JavaScript programming
- Announcements from Codecademy JU chapter
This is the presentation I was using when delivering the JavaScript Jump Start meetup on February 14th, 2022. More information about that meetup can be found at https://www.meetup.com/lifemichael/events/278743661/ You can find the video at https://youtu.be/F1e-KHTEKzo
INTRODUCTION TO CLIENT SIDE PROGRAMMINGProf Ansari
1 JavaScript was designed to add interactivity to HTML pages.
2 It is a scripting language.
3 A scripting language is a lightweight programming language.
4 A JavaScript consists of lines of executable computer code.
5 It is usually embedded directly into HTML pages.
6 It is an interpreted language (means that scripts execute without preliminary compilation).
7 Everyone can use JavaScript without purchasing a license.
This document provides an introduction to JavaScript and the Document Object Model (DOM). It discusses what JavaScript is, how it can be implemented into web pages, its syntax, data types, functions, and how it interacts with the DOM. JavaScript allows dynamic behavior and interactivity on web pages by accessing and modifying elements and properties of the DOM tree.
Typescript: enjoying large scale browser developmentJoost de Vries
Programming with types has traditionally been something done on the server side.
For browser developers I show in my presentation how the type support in Typescript makes your life easier as your codebase increases.
For server side developers I explain what some of the challenges are when it comes to programming with types in the browser. And how Typescript adresses them.
Finally I show some of the cool useful features in Typescript 2.0 that go beyond what most server side languages offer right now.
It turns out that with enough code browser development and server side development have a lot in common.
Slides of a talk given at Join 2016, October 5th, Mechelen Belgium
JavaScript is a scripting language that allows adding interactivity to HTML pages. It can be used for client-side form validation and integration with user plugins. JavaScript is case-sensitive and allows variables, functions, conditional statements, and objects. Common uses include pop-up boxes, event handling, and cookies.
Learn the core fundamentals of JavaScript and how to use JavaScript creating web applications.
GET the Course - https://www.udemy.com/javascript-code-course/?couponCode=SLIDESHARE
Learn JavaScript Language Fundamentals and start coding JavaScript Today.
Source Code is included so you can try the code.
Resources and tips are provided throughout the course when appropriate.
Modern JavaScript focused means that we do cover current syntax as well as foundational code. No frameworks or JavaScript libraries you can do it all with regular vanilla JavaScript.
All you need is a browser to see JavaScript in action and with a few lines of code you can do a whole lot. It’s easy let us show you.
Course covers
Setup you working development environment and get ready to write some code.
What JavaScript is and how code works. Tools and resources used to write JavaScript
How to create JavaScript Code and run it in your browser
Comments and debugging with the console
Variables and how to create and store values in code
Declaring variables assigning values
Using let and const as variables
Strings Numbers and Boolean data types
Other data types null, undefined
Best practices and rules to name variables
Using JavaScript windows methods alert and prompt
Creating template literals
Challenge #1 Using Template literals in code
JavaScript type conversion and how it works
JavaScript Operators
Comparison and Assignment operators
Challenge #2 to create a Miles to Kilometers Converter
Truthy or Falsy
JavaScript Conditions if else statements
JavaScript Conditions else if statements
Using Short ternary operator
Conditions with Multiple conditions and logical operators
Challenge #3 - Hello Greeter
JavaScript Switch statement
JavaScript Functions
JavaScript Functions arguments and default values
JavaScript Functions return values
JavaScript click events on elements
Function declaration vs expression
Function scope global vs local
Function recursion
IIFE (Immediately Invoked Function Expression)
ES6 Arrow format
JavaScript Objects
Object Method and const
Functions to create Objects
JavaScript Arrays
Array methods to do more with arrays
Array filter
JavaScript Loops and iteration
forEach, object and array data
Challenge #4 - Loops Array builder
JavaScript Map
No libraries, no shortcuts just learning JavaScript making it DYNAMIC and INTERACTIVE web application.
Step by step learning with all steps included.
Beginner JavaScript knowledge is required as the course covers only JavaScript relevant to the building of the game. Also HTML and CSS knowledge is essential as scope of this course is all JavaScript focused.
Along with friendly support in the Q&A to help you learn and answer any questions you may have.
Type conversion in C provides two methods: implicit type conversion which occurs automatically during expressions, and explicit type conversion using cast expressions. Implicit conversion occurs when different types are used in expressions, such as when an int is used in a calculation with a float. The usual arithmetic conversions implicitly promote operands to the smallest type that can accommodate both values. Explicit casting uses cast operators to force a type conversion.
The document discusses JavaScript topics that will be covered in a web technology course. It outlines 10 lectures covering JavaScript introduction, variables, operators, conditional and loop statements, functions, event handling, objects, cookies, forms validation, AJAX, and VBScript. The first lecture defines JavaScript, what it can do, and provides simple examples of JavaScript code embedded in HTML and using external JavaScript files. It also covers variable declaration, local and global variables.
JavaScript is a scripting language that can be used to make web pages interactive. It allows you to check and modify HTML forms, change images, and write dynamic content. JavaScript code is executed by the browser and only affects the current page. The language is case sensitive, lightweight, and interpreted rather than compiled. Variables, literals, objects, operators, control structures, and functions are the basic components of JavaScript code. Comments can be added to explain code. JavaScript code can be embedded directly in HTML pages or linked via external .js files. Code placement in the head or body affects when it runs.
- JavaScript is a client-side scripting language used to make web pages dynamic. It is embedded in HTML and runs in web browsers.
- JavaScript code can be placed inline in HTML, in <script> tags in the <head> or <body>, or linked via external .js files.
- The document covers JavaScript syntax, data types, string operations, functions, form validation, and examples of alerts, prompts, and calculating sums.
The document provides information on JavaScript fundamentals including:
- JavaScript is an object-oriented scripting language used to make web pages interactive. It was originally called LiveScript and developed by Netscape.
- JavaScript can be used for both client-side scripting in web browsers and server-side scripting using Node.js. It is an interpreted language that is loosely typed, prototype-based, and supports operators, control structures, and functions.
- Common uses of JavaScript include form validation, dynamic updating of content, and basic interactivity on web pages. It works with HTML and CSS to create dynamic web pages.
JavaScript events allow code to run in response to user actions or changes to the document. Common events include onclick which fires when the user clicks an element, and onload which fires when a page finishes loading. JavaScript code is associated with events using HTML event handler attributes or by registering event listeners in the code. Events help make pages dynamic and interactive by triggering JavaScript functions in response to user input.
This document provides an introduction to JavaScript. It defines JavaScript as a lightweight, interpreted programming language that allows adding interactivity to HTML pages. Some key points covered include:
- JavaScript advantages like less server interaction and immediate feedback.
- JavaScript limitations like not allowing file reading/writing.
- The Document Object Model (DOM) represents the HTML document when loaded into a browser as a document object that provides access to all node objects.
- Common JavaScript operators, conditional statements, and built-in objects like Math, Date, String, and Window are described. Form validation using JavaScript is also discussed.
This document provides an introduction to JavaScript, including:
- JavaScript is a scripting language used to programmatically access computational objects in a host environment and is prototype-based and dynamically typed.
- It was initially created by Netscape in 1995 under the name LiveScript and later renamed to JavaScript.
- JavaScript implementations have three main parts - the core ECMAScript language, the Document Object Model (DOM) for manipulating HTML/XML documents, and the Browser Object Model (BOM) for accessing browser capabilities.
- The DOM represents documents as nodes that can be traversed and manipulated, with levels that have added functionality over time. The BOM allows manipulating browser windows and accessing information about the browser, screen,
This document discusses AngularJS, a JavaScript framework. It provides an overview of AngularJS, describing it as a structural framework for dynamic web apps led by Google that uses HTML as a template language. It also outlines some key features of AngularJS like its MVC architecture, two-way data binding, support for unit testing, and use of plain JavaScript objects. Popular companies that use AngularJS are also listed.
Microsoft Typescript is a statically typed compiled language to clean and a simple plain old JavaScript code which runs on any browser, in Node.js or in any JavaScript engine that supports ECMAScript 3 (or newer).
JavaScript is a scripting language that adds interactivity to HTML pages. It works in all major browsers and is used to build dynamic web pages. JavaScript can react to events, modify HTML elements, validate forms, detect browsers, and write cookies. It is commonly placed in <script> tags within HTML pages or linked via external .js files. Comments are added to explain JavaScript code and prevent execution.
This document provides an overview of JavaScript including:
- JavaScript is an interpreted programming language that allows adding interactivity to HTML pages.
- It is commonly used for client-side scripting of web pages in browsers.
- Core JavaScript concepts like variables, data types, operators, and functions are introduced.
- Different types of loops in JavaScript like for, for/in, while and do/while loops are explained.
- Best practices for including JavaScript code in HTML files using <script> tags are covered.
Introduction to TypeScript by Winston LeviWinston Levi
TypeScript is a superset of JavaScript that compiles to JavaScript. It adds optional static typing, classes, and interfaces to JavaScript to help catch errors. TypeScript code is converted to JavaScript at compile time. There are three versions of ECMAScript that TypeScript works with - ES3, ES5, and ES6. TypeScript allows for both static and dynamic typing through features like type declarations and generics.
Java Script is one of the most pervasive languages found on the internet and World Wide Web. Java Script is useful in making web pages more interactive. The pages can be made to react to the actions of the users in the form of special effects, both visual and otherwise.
The document provides an overview of JavaScript including its history, uses, and how to implement it. Some key points covered include:
- JavaScript was originally created by Netscape under the names Mocha and LiveScript, and is now known as ECMAScript. It is an interpreted scripting language that can be added to HTML pages or linked via external files.
- JavaScript can be used to make web pages more dynamic by manipulating HTML objects, validating forms, detecting browsers, and handling events. It runs in the browser rather than on the server.
- The document discusses different ways of implementing JavaScript including embedding it directly in HTML, linking external .js files, and issues around browser compatibility.
-
JavaScript Roadmap - The Basics event presentation covers:
- JavaScript Applications
- History of JavaScript
- Basics of JavaScript programming
- Announcements from Codecademy JU chapter
This is the presentation I was using when delivering the JavaScript Jump Start meetup on February 14th, 2022. More information about that meetup can be found at https://www.meetup.com/lifemichael/events/278743661/ You can find the video at https://youtu.be/F1e-KHTEKzo
INTRODUCTION TO CLIENT SIDE PROGRAMMINGProf Ansari
1 JavaScript was designed to add interactivity to HTML pages.
2 It is a scripting language.
3 A scripting language is a lightweight programming language.
4 A JavaScript consists of lines of executable computer code.
5 It is usually embedded directly into HTML pages.
6 It is an interpreted language (means that scripts execute without preliminary compilation).
7 Everyone can use JavaScript without purchasing a license.
This document provides an introduction to JavaScript and the Document Object Model (DOM). It discusses what JavaScript is, how it can be implemented into web pages, its syntax, data types, functions, and how it interacts with the DOM. JavaScript allows dynamic behavior and interactivity on web pages by accessing and modifying elements and properties of the DOM tree.
Typescript: enjoying large scale browser developmentJoost de Vries
Programming with types has traditionally been something done on the server side.
For browser developers I show in my presentation how the type support in Typescript makes your life easier as your codebase increases.
For server side developers I explain what some of the challenges are when it comes to programming with types in the browser. And how Typescript adresses them.
Finally I show some of the cool useful features in Typescript 2.0 that go beyond what most server side languages offer right now.
It turns out that with enough code browser development and server side development have a lot in common.
Slides of a talk given at Join 2016, October 5th, Mechelen Belgium
JavaScript is a scripting language that allows adding interactivity to HTML pages. It can be used for client-side form validation and integration with user plugins. JavaScript is case-sensitive and allows variables, functions, conditional statements, and objects. Common uses include pop-up boxes, event handling, and cookies.
Learn the core fundamentals of JavaScript and how to use JavaScript creating web applications.
GET the Course - https://www.udemy.com/javascript-code-course/?couponCode=SLIDESHARE
Learn JavaScript Language Fundamentals and start coding JavaScript Today.
Source Code is included so you can try the code.
Resources and tips are provided throughout the course when appropriate.
Modern JavaScript focused means that we do cover current syntax as well as foundational code. No frameworks or JavaScript libraries you can do it all with regular vanilla JavaScript.
All you need is a browser to see JavaScript in action and with a few lines of code you can do a whole lot. It’s easy let us show you.
Course covers
Setup you working development environment and get ready to write some code.
What JavaScript is and how code works. Tools and resources used to write JavaScript
How to create JavaScript Code and run it in your browser
Comments and debugging with the console
Variables and how to create and store values in code
Declaring variables assigning values
Using let and const as variables
Strings Numbers and Boolean data types
Other data types null, undefined
Best practices and rules to name variables
Using JavaScript windows methods alert and prompt
Creating template literals
Challenge #1 Using Template literals in code
JavaScript type conversion and how it works
JavaScript Operators
Comparison and Assignment operators
Challenge #2 to create a Miles to Kilometers Converter
Truthy or Falsy
JavaScript Conditions if else statements
JavaScript Conditions else if statements
Using Short ternary operator
Conditions with Multiple conditions and logical operators
Challenge #3 - Hello Greeter
JavaScript Switch statement
JavaScript Functions
JavaScript Functions arguments and default values
JavaScript Functions return values
JavaScript click events on elements
Function declaration vs expression
Function scope global vs local
Function recursion
IIFE (Immediately Invoked Function Expression)
ES6 Arrow format
JavaScript Objects
Object Method and const
Functions to create Objects
JavaScript Arrays
Array methods to do more with arrays
Array filter
JavaScript Loops and iteration
forEach, object and array data
Challenge #4 - Loops Array builder
JavaScript Map
No libraries, no shortcuts just learning JavaScript making it DYNAMIC and INTERACTIVE web application.
Step by step learning with all steps included.
Beginner JavaScript knowledge is required as the course covers only JavaScript relevant to the building of the game. Also HTML and CSS knowledge is essential as scope of this course is all JavaScript focused.
Along with friendly support in the Q&A to help you learn and answer any questions you may have.
Type conversion in C provides two methods: implicit type conversion which occurs automatically during expressions, and explicit type conversion using cast expressions. Implicit conversion occurs when different types are used in expressions, such as when an int is used in a calculation with a float. The usual arithmetic conversions implicitly promote operands to the smallest type that can accommodate both values. Explicit casting uses cast operators to force a type conversion.
The document discusses JavaScript topics that will be covered in a web technology course. It outlines 10 lectures covering JavaScript introduction, variables, operators, conditional and loop statements, functions, event handling, objects, cookies, forms validation, AJAX, and VBScript. The first lecture defines JavaScript, what it can do, and provides simple examples of JavaScript code embedded in HTML and using external JavaScript files. It also covers variable declaration, local and global variables.
Scripts follow specific formats and styles to effectively convey a story through film or television. The format includes guidelines for page length, typeface, and layout of scene elements like dialogue and headings. The style focuses descriptions on what can be seen and heard, using codified notations for transitions and off-screen dialogue. A good script is crucial for short films, as it must tightly develop characters and tell a story concisely. Getting feedback on scripts from others before production helps strengthen the writing.
This document provides an overview of scripting languages, including both client-side and server-side languages. It discusses what scripting languages are and how they differ from other programming languages. Several popular scripting languages are described, including JavaScript, PHP, ASP.NET, and more. JavaScript is discussed in more depth as a commonly used client-side language for adding interactivity to web pages. The document also covers JavaScript syntax like variables, operators, and functions, and how JavaScript interacts with web pages using the Document Object Model (DOM).
This document contains 16 programming problems and their solutions in PL/SQL. The problems cover basic concepts like nested programs, if/else conditions, loops (while, for), functions to find greatest of numbers, calculate interest, swap values, and more. Sample inputs and outputs are provided for each problem to demonstrate how the programs work. The goal is to help learn PL/SQL programming through examples.
The document discusses scriptwriting and the commissioning process. It explains that it is very difficult for unknown scriptwriters to get their work published or accepted by production companies. The BBC Writersroom aims to help new and young scriptwriters by assessing their scripts, providing feedback to improve their writing, and potentially helping get their scripts commissioned. The Writersroom only accepts certain types of scripts over 30 pages and follows a multi-step process of sorting and reading submissions.
Implicit conversions occur when expressions have mixed types or function arguments do not match the function prototype. The compiler first tries a trivial conversion, then promotion, then a built-in type conversion, then a user-defined conversion, generating an error if none match. User-defined conversions are checked to see if the type needed has a defined conversion and if the supplied type matches or can be promoted. At most one built-in and one user-defined conversion will be applied. Explicit conversions occur when a cast is used, creating a temporary object that is destroyed after the statement.
How to Write a Screenplay or Tell a Better Story Victor Pineiro
For anyone who wants to tell a better story, or specifically write a screenplay, I thought I'd share advice I've learned on the road.
I wrote this for friends who've wanted me to give them a one hour crash course on storytelling and screenwriting.
I hope this helps!
TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. It adds optional static types, classes, and interfaces to JavaScript to help catch errors. TypeScript supports object-oriented programming concepts like classes, interfaces, inheritance, and modules. It is compatible with JavaScript and can reuse existing JavaScript code and libraries. The TypeScript compiler checks for errors and compiles TypeScript code into JavaScript that can run on any browser, device, or operating system that supports JavaScript.
JavaScript is a client-side scripting language that allows dynamic interactions and effects on web pages. It can be inserted directly into HTML code or linked via external .js files. The DOM (Document Object Model) represents an HTML or XML document as a tree structure, with nodes for elements, attributes, and text. This allows JavaScript to access and manipulate the content, structure, and styling of documents. Common JavaScript objects include String, Date, Array, and Math objects for manipulating text, dates, arrays of values, and mathematical operations respectively.
JavaScript is a programming language used to make web pages interactive. It allows calculations, form validation, games and other effects to be added to web pages. JavaScript code runs in the user's browser and works on any platform with a JavaScript-capable browser. Events like clicks or page loads can trigger JavaScript functions. JavaScript can be embedded directly in HTML pages or linked from external files and is commonly used to enhance user experience on websites.
This document provides an overview of JavaScript for students. It defines JavaScript, explains why and how it is used, and covers basic JavaScript concepts like comments, functions, and events. Some key points:
- JavaScript is a scripting language commonly used for web development to make pages dynamic and interactive. It runs in the browser rather than on servers.
- JavaScript can be used to validate forms, change content, hide/show elements, and more. Popular uses include adding interactivity to websites and building front-end frameworks.
- Code is inserted between <script> tags and can be placed in HTML <head> or <body>. Functions are blocks of reusable code defined with function keywords.
- Events
The front-end React developer world is all abuzz with the fondness of using and preferring TypeScript over JavaScript. Although it’s not recommended for all types of projects it strongly overcomes many shortcomings of JavaScript and improves over it.
TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. It adds optional static types, classes, and interfaces to JavaScript to help catch errors. TypeScript is developed by Microsoft and is often used for large-scale JavaScript applications. Some key benefits of TypeScript include compilation to catch errors early, strong static typing for IntelliSense and refactoring, and support for modern JavaScript features while allowing for backwards compatibility.
Moving From JavaScript to TypeScript: Things Developers Should KnowFibonalabs
Moving from javascript to typescript is not that tedious if you follow the proper steps since every JS code is a valid typescript code. You can choose to convert the files where you require strict typing and keep the other files without a change.
This article is the first part of a series of articles on using JavaScript tools. Today, JavaScript is a very powerful language that can be used to build web apps, mobile apps, and even some pc games — perhaps a bit faster than you would build them otherwise.
New libraries have emerged in the web industry to address the challenges of JavaScript — libraries such as JQuery, Prototype and many others have been released. Today, a popular question asked by many is — should i learn the libraries such as jQuery or learn basic JavaScript. The truth is that the libraries help you to create faster, responsive JavaScript, but there are still times when your basic knowlege of JavaScript will be called into question. It is for this reason that I have created this eBook, to assist newbies learn JavaScript.
The document provides an overview of JavaScript and how to create programmable web pages. It discusses using JavaScript for client-side programs, the differences between JavaScript and Java, writing JavaScript programs, working with variables and data types, using operators and expressions, and creating functions. The key topics covered include embedding and linking to JavaScript scripts, using comments, writing output to web pages, and retrieving values from dates.
1) The document discusses JavaScript and how it can be used to enhance web pages.
2) JavaScript code is written within HTML pages using <script> tags and can reference built-in browser objects like document to manipulate the page.
3) JavaScript supports variables, arrays, functions, and basic programming constructs like if/else statements and loops. While not fully object-oriented, it allows the creation and manipulation of objects.
An introduction to Typescript for programmers who use JavaScript.
It goes through what it is, what's it useful for, how to start using it and some things I've observed while using it.
Notes are not available but feel free to PM me if you have any question.
This document provides an introduction to JavaScript by explaining what it is, how it differs from Java, how it works within web browsers to make pages interactive, and some common uses of JavaScript including form validation and manipulating HTML elements. It discusses how JavaScript code is embedded in HTML pages and executed on the client-side, and provides some simple examples of JavaScript statements and using JavaScript with HTML forms.
Introduction to mean and mern || Event by DSC UNIDEBMuhammad Raza
The document provides an introduction to various web development technologies including MongoDB, Express, React, Node.js, and TypeScript. It discusses what each technology is used for and its benefits. MongoDB is introduced as a NoSQL database for storing data. Express is described as a web application framework built on Node.js that adds functionality like middleware and routing. React is summarized as a JavaScript library that uses a component-based approach. Node.js is a runtime environment for building server-side applications using JavaScript. TypeScript adds static typing to JavaScript to catch errors earlier.
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JavaScript is a scripting language that enhances functionality and appearance of web pages. It allows pages to be more dynamic and interactive through features like form validation, cookies, and animations. JavaScript code is embedded directly into HTML and runs in web browsers and other environments. A basic JavaScript program prints text to a web page. It uses <script> tags to indicate JavaScript code and document.writeln() to output text. User input can be obtained through prompts, which pop up dialog boxes. Variables are used to store and work with input data. The code examples demonstrate basic output and input methods in JavaScript.
The document provides information about JavaScript including:
- JavaScript is a scripting language that adds interactivity to HTML pages and is used for client-side scripting.
- It can dynamically update HTML content, react to user events, validate form data, and detect the visitor's browser.
- JavaScript code can be embedded directly in HTML pages or placed in external .js files and included using script tags.
- The document discusses JavaScript variables, data types, operators, functions, and common uses of JavaScript in web pages.
JavaScript is a scripting language used to make web pages interactive. It allows client-side code to interact with users and dynamically update pages. JavaScript can be used to add interactivity to websites through features like dropdown menus, alerts, and animations. It is commonly used by placing <script> tags in HTML pages and can also be linked via external .js files. JavaScript has many operators for arithmetic, comparison, logical, and bitwise operations that allow it to manipulate variables and values.
This document provides an overview of JavaScript, including:
- Its origins and development over time
- How it can be used to make webpages dynamic and interactive
- Key JavaScript concepts like variables, arrays, functions, and events
- How it interacts with and manipulates the DOM
- Its rebirth with the introduction of AJAX, which allows asynchronous data fetching and partial page updates
This document provides an overview of JavaScript, including what JavaScript is, how it is used, and some key JavaScript concepts. It defines JavaScript as the scripting language of the web that is used to add interactivity and functionality to HTML pages. The document outlines JavaScript statements, variables, operators, events, and error handling. It also discusses how JavaScript can interact with HTML elements, validate forms, detect the browser, and use cookies. The last few sections cover the navigator object and how JavaScript can retrieve information about the user's browser.
As a leading data visualization tool Tableau has many desirable and unique features. Its powerful data discovery and exploration application allows you to answer important questions in seconds. You can use Tableau's drag and drop interface to visualize any data, explore different views, and even combine multiple databases together easily. It does not need any complex scripting. Anyone who understands the business problem can address it with a visualization of the relevant data. When the analysis is finished, sharing with others is as easy as publishing to Tableau Server.
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The document provides an overview of the Jive Engage collaboration and knowledge management tool. It describes the tool's features for integrating online communities, microblogging, social networking, discussion forums, blogs and wikis. It also outlines some of the administration features for managing the tool, including system settings, permissions, content and users. Finally, it provides step-by-step instructions for setting up a new instance of the tool, including configuring the license, database, and initial community setup.
This document provides an overview of Perl scripting and CGI programming. It covers topics such as the introduction to CGI, how CGI works, preparing CGI programs, the history and features of Perl, and how to write basic Perl CGI programs. The document is intended to help participants understand Perl scripting and CGI programming after completing this training.
This document provides an overview and tutorial on the Dojo JavaScript framework. It covers:
- What is Dojo and its key features such as widgets, utilities, and being open source.
- The different components included with Dojo like trees, buttons, grids and more.
- How to install Dojo and include themes for a consistent look and feel.
- An example of a basic "Hello World" Dojo application to demonstrate usage.
This document provides a tutorial on the Dojo JavaScript framework. It introduces Dojo, describes its key features like widgets, utilities and AJAX libraries. It covers loading and installing Dojo, creating a basic "Hello World" button widget, and compares Dojo to other frameworks like jQuery and YUI.
Skybuffer AI: Advanced Conversational and Generative AI Solution on SAP Busin...Tatiana Kojar
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Join HCL Ambassador Marc Thomas in this webinar with a special guest appearance from Franz Walder. It will give you the tools and know-how to stay on top of what is going on with Domino licensing. You will be able lower your cost through an optimized configuration and keep it low going forward.
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In the rapidly evolving landscape of technologies, XML continues to play a vital role in structuring, storing, and transporting data across diverse systems. The recent advancements in artificial intelligence (AI) present new methodologies for enhancing XML development workflows, introducing efficiency, automation, and intelligent capabilities. This presentation will outline the scope and perspective of utilizing AI in XML development. The potential benefits and the possible pitfalls will be highlighted, providing a balanced view of the subject.
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2. Objective
Introduction to jscript.
Difference between Jscript, JavaScript and
2
VBScript.
Versions.
Programming logic techniques of the Jscript.
Writing Jscript statements and coding.
OOPs Concept.
Understanding JScript objects.
Working with methods .
The JScript object hierarchy.
Practice Examples
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3. Topics has to be covered…
Day 1
Introduction to jscript.
Javascript vs jscript and other
scripting languages.
Versions.
Day 2
OOPs Concept
Understanding JScript objects
Array handling
Exception Handling
Array Object
Error Object
The role of objects in JScript
programming
Programming logic techniques Working with methods and
of the Jscript
properties
Writing Jscript statements and The JScript object hierarchy
coding
String Handling
Object Literals
3
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4. What Is script ?
In computer programming, a script is a program
4
or sequence of instructions that is interpreted or
carried out by another program rather than by the
computer processer (as a compiled program is).
A script is sometimes used to mean a list of
operating system commands that are pre-stored
in a file and performed sequentially by the
operating system's command interpreter
whenever the list name is entered as a single
command.
Multimedia development programs use "script" to
mean the sequence of instructions that you enter
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to indicate how a multimedia sequence of files will
5. What Is scripting language ?
A scripting language is a form of programming
5
language that is usually interpreted rather than
compiled.
Conventional programs are converted
permanently into executable files before they are
run. In contrast, programs in scripting language
are interpreted one command at a time.
Scripting languages can be used to create
specialized GUIs (graphical user interfaces) and
forms that enhance the convenience of search
engines, Web-based e-mail and e-commerce.
For Example: C
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shell, JavaScript, Jscript, Perl, PHP, Python, VBS
6. Introduction of JScript
JScript is a scripting language from Microsoft that is
expressly designed for use within Web pages. It
adheres to the ECMAScript standard and is basically
Microsoft's equivalent to Netscape's earlier and more
widely used JavaScript.
ECMAScript (European Computer Manufacturers
Association Script)
ECMAScript is a standard script language, developed
with the cooperation of Netscape and Microsoft and
mainly derived from Netscape's JavaScript, the widelyused scripting language that is used in Web pages to
affect how they look or behave for the user.
ECMAScript is object-oriented and conceived as a core
language to which can be added the objects of any
6
specific domain or context such as the idea of a 10/15/2013
7. Using JScript
JScript is an interpreted, object-based scripting
language. Although it has fewer capabilities than fullfledged object-oriented languages like C++, JScript is
more than sufficiently powerful for its intended
purposes.
JScript is not a cut-down version of another language
(it is only distantly and indirectly related to Java, for
example), nor is it a simplification of anything.
You cannot write stand-alone applications in it, and it
has no built-in support for reading or writing files.
Jscript scripts can run only in the presence of an
interpreter or "host", such as Active Server Pages
(ASP), Internet Explorer, or Windows Script Host.
7
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8. JavaScript Vs JScript Vs VBScript
JavaScript
JavaScript is a light weight and very simple Scripting Language
that has Object Oriented capabilities and most importantly it is a
cross platform Scripting Language.
These scripts can be integrated directly into the HTML code.
JavaScript was originally developed by Netscape.
Here is a simple example showing a text in a web page using
JavaScript.
<html>
<body>
<script type="text/javascript">
{
document.write("Hello JavaScript");
}
</script>
</body>
</html>
8
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9. Jscript
Actually JScript is just the Microsoft's version of
JavaScript. Microsoft thought of implementing their own
version of JavaScript and they named it as JScript.
But in some situations JScript is not behaving like
JavaScript.
Take a simple example: Let's declare a variable called
temp in JavaScript code and create a object within the
page having the field id as "temp".
var temp = 'Hello';
And trying to set the value of object temp in the page to
the value of variable temp.
document.getElementById('temp').innerHTML = temp;
9
10/15/2013
10. Cont…
In the above example, is working fine, but the JScript gives a
error.
reason behind this is, in here JScript does not recognize the
difference between var
temp and document.getElementById('temp'). So he treats as
both of them are referring to one single object. But
JavaScript recognises the temp variable and the object within
the page having id "temp" as two entirely separate fields.
So this is a one significant difference between JavaScript and
JScript.
here is a simple example showing a text in a web page using JScript.
10
<html>
<body>
<script type="text/JScript">
{
document.write("Hello JScript");
}
</script>
</body>
</html>
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11. VBScript
VBScript is Microsoft's Scripting Language just as JScript.
It is actually a child of Microsoft's Visual Basic for use with
web pages and other applications that uses Microsoft
ActiveX controls.
VBScript is very similar to JavaScript, but VBScript
syntaxes are more similar to Visual Basic.
Comparison of JavaScript and VBScript
11
10/15/2013
12. Cont…
Similarities
Differences
Both languages are easy to learn and
do not require any expensive
development tools.
JavaScript is the default scripting
language for browsers but VBScript
must be specified as the scripting
language.
Both can be used to enhance web
pages.
JavaScript has cross-platform support
from all popular browsers while
VBScript is supported MS IE only.
Both can abuse and run malicious
scripts on clients' machines.
JavaScript is case sensitive but
VBScript is not this would not be
prone to as many syntax errors like
missing >
JavaScript uses the same character
for concatenation as it does for
addition (the + character) while the '&'
concatenating character is used in
VBScript. This is another source of
errors in JavaScript.
12
10/15/2013
13. Cont…
Here is a simple example showing a text in a web
page using VBScript.
<html>
<body>
<script type="text/vbscript">
{
document.write("Hello VBScript");
}
</script>
</body>
</html>
13
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14. Version
The following table lists the version of Microsoft JScript implemented by host
applications.
Host application
JScript version
Internet Explorer 3.0
Internet Information Server 3.0
2.0
Internet Explorer 4.0
3.0
Internet Information Server 4.0
3.0
Visual Studio 6.0
4.0
Internet Explorer 5.0
5.0
Internet Explorer 5.01
5.1
Windows 2000
5.1
Internet Explorer 5.5
5.5
Internet Explorer 6.0
5.6
Windows XP (through SP2)
5.6
Internet Explorer 7.0
5.7
Windows XP SP3
14
1.0
5.7
Windows Vista
5.7
Internet Explorer 8.0
5.8
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15. Applications Fundamentals
Practical Learning: Adding the Compiler to the Path
Start Windows Explorer and locate the folder where
your jsc application is installed. Here is an example:
15
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16. Cont…
Click Start -> Control Panel
Double-click System
In the System Properties dialog box, click the Advanced
16
tab and click Environment Variables
In the System Variables section, click Path and click
Edit
Press End or get to the end of the string
Type ; followed by the complete path to the compiler.
Click OK on each dialog box
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17. Practical Learning: Introducing Jscript
Code
Start Notepad and in it, type print("Welcome to the
17
Wonderful World of JScript ");
To save the file, on the main menu, click File -> Save
Select and display the C: drive in the Save In combo box
Click the Create New Folder button
Type JScript Lessons
Press Enter twice or display the new folder in the Save In
combo box
Click the Create New Folder button again
Type Exercise1 and press Enter twice or display the new
folder in the Save In combo box
Save the file as exercise.js
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18. Practical Learning: Compiling an
Application
To test the application, open the Command Prompt
and change to the folder in which you created the
Jscript file.
18
•Type jsc exercise.js and press Enter
•When the program has finished compiling,
type exercise and press Enter
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19. A Custom Name for an Executable
As mentioned above, if you compile your application by
simply invoking the name of the script file that contains
the code, an executable with the same name as the file
would be created.
Fortunately, when compiling the file, you can specify the
name you want for the executable.
jsc /out:ApplicationName File.js
you must first call the compiler as done previously. It must be
followed by /out: which indicates that you are going to specify the
name of the executable.
After the /out: factor, type the desired name that will hold the name
of the new application instead of the name of the file.
Lastly, type the name of the file that contains the script and make
sure you append its extension.
19
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20. To compile with debugging information
using jsc
At the command prompt, type
jsc /debug file.js
The command compiles the program
named file.js with the /debug option to produce the
executable named file.exe and a file
named file.pdb that contains debugging information.
http://msdn.microsoft.com/enus/library/0h6706k6(v=vs.71).aspx
Debugging JScript with Visual Studio
http://msdn.microsoft.com/enus/library/bssx024s%28v=vs.80%29.aspx
20
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21. Programming logic techniques of the
Jscript
Variables
Statements
Data types
Comments
Operators and its Precedence
Controlling Program flow
Jscript reserve words
Conditions and Loops
21
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22. Variables
A typical program uses various and different values.
Some are used for display to the user. Some are
requested from the user.
To manage these various values, the compiler reserves
some sections of the computer memory to store them.
To declare a variable, type var, followed by a name for
the variable, followed by a colon, and followed by a
word that defines the type of value that would be stored
in this memory space.
ovar VariableName : DataType;
This means that, to declare a variable, you must
22
provide a name and specify the type of information the
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variable will carry.
23. Identifiers
An identifier is a word that is used to identify an entity in
a program. There are rules you must follow when
naming your variables. They are:
The first character must be a letter
(a, b, c,…, z, A, B, C, …, or Z) or an underscore (_).
Examples are _pages, country, or sound
After the first character, the name can contain
letters, underscores, or digits (0, 1, 2, 3,…, or 9).
Examples are number1, _page6, complete_sound
The complete name must not be one of the words
reserved for the compilers own use
23
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24. Cont…
JScript is case-sensitive. This means that
case, CASE, and Case are three different words. Based
on these rules, avoid using the following reserved words
to name your variables:
abstract
char
default
export
break
const
do
false
byte
continue
double
final
for
24
boolean
class
delete
extends
function
get
if
in
new
return
super
typeof
while
instanceof
null
sbyte
switch
uint
with
int
package
set
this
ulong
interface
private
short
throw
ushort
case
debugger
else
finally
implement
s
internal
protected
static
true
var
catch
decimal
enum
float
import
long
public
try
void
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25. Comments And Escape Sequence
A comment is a line or paragraph of text that the
compiler would not consider when examining the code
of a program.
To display a comment on a line of text, start the line
with two forward slashes //. Anything on the right side
of // would be ignored. Here is an example:
// This line will be ignored. I can write in it anything I
want
The above type of comment is used on only one line.
You can also start a comment with /*. This type of
comment ends with */.
Anything between this combination of /* and */ would
not be read by the compiler. Therefore, you can 10/15/2013
use
25
this technique to span a comment on more than one
26. Escape Sequences
An escape sequence is a special character that
displays non-visibly. For example, you can use this
type of character to indicate the end of line, that is,
to ask the program to continue on the next line.
An escape sequence is represented by a backslash
character, , followed by another character or
symbol. For example, the escape sequence that
moves to the next line is n.
An escape can be included in single-quotes as in
'n'. It can also be provided in double-quotes as "n".
26
10/15/2013
27. Cont…
Escape Sequence
Name
b
Backspace
t
Horizontal Tab
n
New line
v
Vertical Tab
f
Form feed
r
Carriage return
Causes a carriage return
s
Any Character
Matches any white space character
S
Any Character
Matches any non-white space character
'
Single Quote
Displays a single quote
"
Double Quote
Displays a double quote
Backslash
Displays a backslash ()
h
Character
xhh
2-Digit Hex
xhhhh
4-Digit Hex
27
Description
Takes the cursor back by one space
Takes the cursor to the next tab stop
Takes the cursor to the beginning of the
next line
Performs a vertical tab
Displays an ASCII character from an octal
number
Displays a hexadecimal number with two
digits
Displays a hexadecimal number with four
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digits
28. Data Types
A data type is a word that indicates the amount of
memory needed to store the value of a variable.
As there are various types of values used in a program,
there are also different data types. Some data types are
meant to hold numbers. Some others are form particular
values such as one being true or false.
In short, data types are specifications of how to handle
variables. The interpreter needs to know how much
memory he shall reserve for the data, and what can be
done with these.
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29. Cont…
Data Type
Description
Example
Char
a single character,
enclosed in single
quotation marks
var c: char = ’a’;
String
a sequence of
characters, enclosed in
double quotation marks
var s: String = "Hello";
Int
a 32-bit integer value,
ranging from 2.147.483.648 to
2.147.483.647
var i: int = 1;
Uint
a unsigned 32-bit integer,
ranging from 0 to
4.294.967.295
var i: uint = 1;
Boolean
a boolean value that is
either true or false
var b: boolean = false;
Double
floating point number of
double precision (about
15 digits)
var d: double = 0.123;
object representing a
var date: Date
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Date
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30. Type mismatch
import System;
var s: int = 3;
s = s + 5;
Console.WriteLine(s);
s = "I’m not an integer!";
Console.WriteLine(s);
import System;
var s = 5;
s = "I’m a string!";
s = s + 3;
Console.WriteLine(s);
NOTE: If you do not initialize a variable, i.e. if you declare a variable
without setting it to a certain value, requesting the value will return NaN
(Not a Number) or ”undefined”, depending on the context in which the
variable was interpreted. For example,
import System;
var i;
Console.WriteLine( "Value of i: " + i);
Console.WriteLine( "Value of 2*i: " + 2*i);
will produce the output ”Value of i: undefined” and ”Value of i: NaN”,
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30
because in the first case we have a type conversion to string, in the
31. Operators and Operands
An operation is an action performed on one or more
values either to modify the value held by one or both of
the variables, or to produce a new value by combining
existing values.
Therefore, an operation is performed using at least one
symbol and at least one value. The symbol used in an
operation is called an operator. A value involved in an
operation is called an operand.
A unary operator is an operator that performs its
operation on only one operand. An operator is referred to
as binary if it operates on two operands.
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33. Operator Precedence
Operator
Description
. [] ()
Field access, array indexing, and function calls
++ -- - ~ ! typeof new void delete Unary operators, return data type, object creation, undefined values
*/%
Multiplication, division, modulo division
+-+
Addition, subtraction, string concatenation
<< >> >>>
Bit shifting
< <= > >=
Less than, less than or equal to, greater than, greater than or equal to
== != === !==
Equality, inequality, identity, nonidentity
&
Bitwise AND
^
Bitwise XOR
|
Bitwise OR
&&
Logical AND
||
Logical OR
?:
Conditional
= OP=
Assignment, assignment with operation
33
,
Multiple evaluation
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34. Sample Example
import System;
var a: boolean = true;
var b: boolean = false;
Console.WriteLine("a AND b = " + (a && b));
Console.WriteLine("a OR b = " + (a || b));
Output:
”a And b = false”
”a OR b = true”
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35. Program Flow
if..else-statements
import System;
var i=Math.random();
if (i<0.5) Console.WriteLine("This number " + i + " is smaller than 0.5");
else Console.WriteLine("This number " + i + " is larger than or equals
0.5");
Here, the code following the if-condition is executed
if the condition is true, and the code following the
else-statement is executed if the statement is false.
This is what you should notice:
35
• the boolean expression has to be set in parenthesis
• the if-clause here only consists of one command. It has to be closed
by a semicolon
• the else-clause also only consists of one command and has10/15/2013
to be
closed by a semicolon
36. for-Loops
The for-loops allow to repeat a command or block of
code for a certain time. Usually, a counter is counted up
until a certain condition does not hold any more.
import System;
var i;
for (i=1;i<10;i++) Console.WriteLine("This is the " + i + ".
line.");
for..in-Loops
import System;
var weekday = ["monday", "tuesday", "wednesday",
"thursday"];
var j;
for (j in weekday) Console.WriteLine(weekday[j]);
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37. while-Loops
The while-loops are similar to the for-loops, but the
header of the while loop has no section for
initializing and no section for incrementation, but just
the section for a comparison, the while-condition.
37
import System;
var steps = 10;
while (steps >= 1) {
if (steps > 1) Console.WriteLine(" There are" +
steps + " to do.");
else Console.WriteLine("Now there is only one
more step");
steps--;
}
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38. do...while
do...while loop in JScript that is similar to the while
loop, except that it is guaranteed to always execute at
least once, since the condition is tested at the end of the
loop, rather than at the start.
38
import System;
var x = 0;
do
{
x = Console.WriteLine("What is my favourite
number?", x);
} while ((x != 42) && (x != null));
if (x == null)
Console.WriteLine("You gave up!");
else
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39. Functions
A function is a piece of code that is encapsulated and
can be executed by calling the command under which
the function is defined.
JScript supports two kinds of functions: those that are
built into the language, and those you create yourself.
o Special Built-in Functions
The JScript language includes several built-in functions.
Some of them let you handle expressions and special
characters, and convert strings to numeric values.
For example, escape() and unescape() are used to
convert characters that have special meanings in HTML
code, characters that you cannot just put directly into
text. For example, the angle brackets, "<" and ">",
delineate HTML tags.
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40. Cont…
•Escape function: Encodes String objectsthese
The escape function takes as its argument any of so
special characters, and all computers.
they can be read onreturns the escape code for the
character. Each escape code consists of a percent sign
•The escape method returns a string value
(%) followed by a two-digit number.
(in Unicode format) that contains the
The unescape function is the exact inverse. It takes as
contents ofacharstring. All spaces, sign and a
its argument string consisting of a percent
punctuation, accented characters, and any other
two-digit number, and returns a character.
non-ASCII characters are replacedwhich %xx
Another useful built-in function is eval(), with
evaluates where mathematical expression
encoding, any validxx is equivalent to thethat is
presented in string form. The eval() function character.
hexadecimal number representing thetakes one
argument, the expression to be evaluated.
For example,anExpression = "6 * 9returned as "%20.“
a space is % 7";
• var
• var total = a value greater than 255 the
•Characters with eval(anExpression); // Assigns the value 5 toare
variable total.
stored using yetAnotherExpression = "6 * (9 % 7)";
• var the %uxxxx format.
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40
• total = eval(yetAnotherExpression); //Assigns the encoded
•Unescape Method: Decodes String objectsvalue 12 to
41. Creating Your Own Functions
You can create your own functions and use them where
you need them. A function definition consists of a
function statement and a block of JScript statements.
For Example:
import System;
function factorial(n)
{
var i;
var f=1;
for (i=1;i<=n;i++) f=f*i;
return f;
}
Console.WriteLine(factorial(8));
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42. Wait functions
42
// The namespace "System.Threading" provides
the "Thread"-class which
// includes the "Sleep"-method
import System.Threading;
var i;
for (i=0; i<=5; i++)
{
// Wait for 500 ms
Thread.Sleep(500);
// Display the variable i in the Output window
System.Console.WriteLine("Number: "+i);
}
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43. JScript Objects
JScript objects are collections of properties and
methods.
A method is a function that is a member of an object,
and a property is a value or set of values (in the form of
an array or object).
Objects as Arrays
In JScript, objects and arrays are handled identically.
You can refer to any of the members of an object :
o either by name (using the name of the object, followed by a
period, followed by the name of the property)
o or by its array subscript index.
All objects in JScript support "expando" properties, or
properties that can be added and removed dynamically
at run time.
43
• var myObj = new Object();
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44. Cont…
The fact that objects can have other objects as
properties lets you generate arrays with more than one
subscript, which are not directly supported. The following
code creates a multiplication table for values from 0
times 0 through 16 times 16.
var multTable = new Array(17); // Make the shell that will become the
table.
for (var j = 0; j < multTable.length; j++) { // Prepare to fill it with rows.
var aRow = new Array(17); // Create a row.
for (var i = 0; i < aRow.length; i++) { // Prepare to fill the row.
aRow[i] = (i + " times " + j + " = " + i*j); // Make and place one value.
}
multTable[j] = aRow; // Put the filled row into the table.
Console.WriteLine(multTable[j]);
}
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45. JScript Reserved Keywords
JScript has a number of reserved keywords that you
cannot use as identifiers.
These words come in three types: JScript reserved
keywords, future reserved words, and words to avoid.
Reserved words have a specific meaning to the JScript
language, as they are part of the language syntax.
Using a reserved word causes a compilation error when
loading your script.
JScript also has a list of future reserved words. These
words are not currently part of the JScript language,
although they are reserved for future use.
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47. Recursion
Recursion is an important programming technique. It is
used to have a function call itself from within itself.
One handy example is the calculation of factorials. The
factorials of 0 and 1 are both defined specifically to be
1.
The factorials of larger numbers are calculated by
multiplying 1 * 2 * ..., incrementing by 1 until you reach
the number for which you're calculating the factorial.
Recursion and iteration (looping) are strongly related anything that can be done with recursion can be done
with iteration, and vice-versa.
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48. Cont…
Here is the factorial function again, this time written in
JScript code.
48
// Function to calculate factorials. If an invalid
// number is passed in (ie, one less than zero), -1
// is returned to signify an error. Otherwise, the
// number is converted to the nearest integer, and its
// factorial is returned.
function factorial(aNumber) {
aNumber = Math.floor(aNumber); // If the number is not an integer,
round it down.
if (aNumber < 0) { // If the number is less than zero, reject it.
return -1;
}
if (aNumber == 0) { // If the number is 0, its factorial is 1.
return 1;
}
else return (aNumber * factorial(aNumber - 1)); // Otherwise, recurse
until done.
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}
49. Variable Scope
JScript has two scopes: global and local.
If you declare a variable outside of any function
definition, it is a global variable, and its value is
accessible and modifiable throughout your program.
If you declare a variable inside of a function definition,
that variable is local.
It is created and destroyed every time the function is
executed; it cannot be accessed by anything outside the
function.
A local variable can have the same name as a global
variable, but it is entirely distinct and separate.
Consequently, changing the value of one variable has
no effect on the other. Inside the function in which the
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49 local variable is declared, only the local version has
50. Example:
50
var aNumber = 100;
var withAdditive = 0;
withAdditive += aNumber; // withAdditive is now
100.
tweak();
withAdditive += aNumber; // withAdditive is now
200.
function tweak() {
var newThing = 0; // Explicit declaration of the
newThing variable.
aNumber = 42;
if (false) {
var aNumber; // This statement is never executed.
aNumber = "Hello!"; // This statement is never
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executed.
51. Special Characters
JScript provides special characters that allow you to
include in strings some characters you cannot type
directly.
Each of these characters begins with a backslash. The
backslash is an escape character you use to inform the
JScriptEscape Sequence the next character is special.
interpreter that
Character
b
n
Line feed (new line)
r
Carriage return
t
Horizontal tab (Ctrl-I)
’
Single quotation mark
”
Double quotation mark
51
Backspace
Backslash
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52. Exception Handling
try...catch.finally Statement
The try...catch.finally statement provides a way to
handle some or all of the possible errors that may
occur in a given block of code, while still running code.
If errors occur that the programmer has not
handled, Jscript simply provides its normal error
message to a user, as if there was no error handling.
52
try {
tryStatements
//Required. Statements where an error
can occur.
}
catch(exception){
catchStatements
//Required. Any variable name.
The initial value of exception is the value of
the thrown error.
} //Optional. Statements to handle errors occurring in the
associated
tryStatements.
finally {
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finallyStatements
//Optional. Statements that are
53. Example
The following example shows how JScript exception handling works.
53
try {
print("Outer try running..");
This produces the following output
try {
print("Nested try running..."); Outer try running..
Nested try running...
throw "an error";
Nested catch caught an error
}
Nested finally is running...
catch(e) {
Outer
print("Nested catch caught " + e); catch caught an error rethrown
throw e + " re-thrown";
Outer finally running
}
finally {
print("Nested finally is running...");
}}
catch(e) {
print("Outer catch caught " + e);}
finally {
print("Outer finally running");}
// Change this for Windows Script Host to say
Programming Concepts Compared in Different Languages with Code Examp
WScript.Echo(s)
http://msdn.microsoft.com/en-us/library/we7h0cz1%28v=vs.80%29.aspx
function print(s){
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document.write(s);}