We all write codes in different ways with a different style and most of the times forgot about standardization.
Let’s discuss #JavaScript Techniques to Improve Your #Code.
https://goo.gl/QzN2J2
The document discusses different approaches to software testing including Behavior Driven Development (BDD), test-driven development (TDD), and unit testing frameworks. It introduces BDD as a process that focuses on specifying what functionality software should provide from the perspective of end users and domain experts. BDD tools like Cucumber and RSpec are discussed as ways to write automated tests in a readable language that can be understood by non-technical stakeholders. Mocking libraries like Mocha are also presented as a way to isolate layers and collaborations when testing code.
Cordova training : Day 3 - Introduction to JavascriptBinu Paul
This document provides an introduction to JavaScript, including:
- JavaScript is a lightweight, interpreted programming language commonly used in web pages.
- Advantages of JavaScript include less server interaction, immediate feedback, and richer interfaces.
- Disadvantages include inability to read/write files for security and lack of multithreading.
- JavaScript syntax can be included in HTML using <script> tags and ignores spaces/newlines.
- Basic data types are strings, numbers, and Booleans, and variables are declared with var.
- Common operators include arithmetic, comparison, logical, and assignment operators.
- Control structures include if/else statements, switch statements, for/while loops.
- Functions are reusable blocks
Best Coding Practices For Android Application DevelopmentKetan Raval
Learn how to make coding at the time of android application development. Best practices for coding for android app development. Points to take care at the time of development application.
1) The document discusses bootstrapping a PHP application called Ubraa using test-driven development.
2) It describes writing a Ubraa_Application class with initialize() and run() methods to bootstrap the application.
3) The document walks through writing the first test for this class to ensure it can be instantiated, and passing this initial test.
Clean code is code that is easy to understand and change over time. It uses descriptive names for variables and functions, keeps functions short and focused on single tasks, handles errors properly, avoids duplication, and uses comments sparingly to explain intent rather than state the obvious. Well-written code with intention-revealing names may not need many comments at all.
Efficient code is code that achieves the desired result using fewer resources like memory, processing power or time. The document gives examples of inefficient code and how they could be made more efficient through techniques like using loops for repetition instead of writing the same code multiple times, storing multiple values in an array instead of separate variables, using elif and else statements in selection to avoid unnecessary comparisons, and using logical operators like and/or to combine conditions in an if statement.
JavaScript is a scripting language that adds interactivity to HTML pages. It can be used to dynamically write text, react to events, read and write HTML elements, validate data, detect the visitor's browser, and create cookies. JavaScript code can be placed in the head or body sections of an HTML page and is usually embedded directly into HTML pages. External JavaScript files can also be used to run the same code on multiple pages.
The document discusses different approaches to software testing including Behavior Driven Development (BDD), test-driven development (TDD), and unit testing frameworks. It introduces BDD as a process that focuses on specifying what functionality software should provide from the perspective of end users and domain experts. BDD tools like Cucumber and RSpec are discussed as ways to write automated tests in a readable language that can be understood by non-technical stakeholders. Mocking libraries like Mocha are also presented as a way to isolate layers and collaborations when testing code.
Cordova training : Day 3 - Introduction to JavascriptBinu Paul
This document provides an introduction to JavaScript, including:
- JavaScript is a lightweight, interpreted programming language commonly used in web pages.
- Advantages of JavaScript include less server interaction, immediate feedback, and richer interfaces.
- Disadvantages include inability to read/write files for security and lack of multithreading.
- JavaScript syntax can be included in HTML using <script> tags and ignores spaces/newlines.
- Basic data types are strings, numbers, and Booleans, and variables are declared with var.
- Common operators include arithmetic, comparison, logical, and assignment operators.
- Control structures include if/else statements, switch statements, for/while loops.
- Functions are reusable blocks
Best Coding Practices For Android Application DevelopmentKetan Raval
Learn how to make coding at the time of android application development. Best practices for coding for android app development. Points to take care at the time of development application.
1) The document discusses bootstrapping a PHP application called Ubraa using test-driven development.
2) It describes writing a Ubraa_Application class with initialize() and run() methods to bootstrap the application.
3) The document walks through writing the first test for this class to ensure it can be instantiated, and passing this initial test.
Clean code is code that is easy to understand and change over time. It uses descriptive names for variables and functions, keeps functions short and focused on single tasks, handles errors properly, avoids duplication, and uses comments sparingly to explain intent rather than state the obvious. Well-written code with intention-revealing names may not need many comments at all.
Efficient code is code that achieves the desired result using fewer resources like memory, processing power or time. The document gives examples of inefficient code and how they could be made more efficient through techniques like using loops for repetition instead of writing the same code multiple times, storing multiple values in an array instead of separate variables, using elif and else statements in selection to avoid unnecessary comparisons, and using logical operators like and/or to combine conditions in an if statement.
JavaScript is a scripting language that adds interactivity to HTML pages. It can be used to dynamically write text, react to events, read and write HTML elements, validate data, detect the visitor's browser, and create cookies. JavaScript code can be placed in the head or body sections of an HTML page and is usually embedded directly into HTML pages. External JavaScript files can also be used to run the same code on multiple pages.
This document introduces an 7-day tutorial to learn ASP.NET MVC in depth. Day 1 focuses on understanding why MVC is better than traditional ASP.NET Web Forms by addressing issues like performance problems and reusability with Web Forms. It includes two labs, one on controllers and one on views, followed by Q&A sections. The goal is to help readers learn MVC step-by-step over the course of the week-long tutorial.
The document discusses coding standards and conventions for collaborative Java development. It outlines general principles like adhering to style and least astonishment. It also describes specific formatting, naming, documentation, and programming conventions like using meaningful names, commenting code, making fields private, and exception handling best practices. Automated tools like Checkstyle and Eclipse formatters can help enforce standards but may require configuration. Additional standards for the class are on the website.
The document provides 8 tips for commenting code, including commenting each level of code, using paragraph comments to describe blocks of code, aligning consecutive line comments, avoiding obvious comments, being polite in comments, commenting while writing code, updating comments when updating code, and emphasizing readable code that requires fewer comments.
The document discusses using KnockoutJS with ASP.NET MVC. It introduces KnockoutJS as a JavaScript library for model-view-viewmodel separation and data binding. It then compares traditional ASP.NET MVC approaches to using KnockoutJS, noting pros and cons of each. It also demonstrates using Knockout mapping to tie Knockout view models to ASP.NET view models, and performing AJAX calls both within and outside the controller.
JavaScript is the most popular scripting language used on web pages. It can be used to add interactivity and dynamic content to HTML pages. JavaScript code can be embedded directly in HTML pages or stored externally in .js files. JavaScript code can be placed in the <head> or <body> sections of an HTML page. Common JavaScript statements include conditional statements like if/else, loops like for and while loops, and functions. JavaScript also provides popup boxes like alert, confirm, and prompt to interact with users.
This document provides coding challenges related to switch statements in Java. It includes:
1. Three coding challenges - to identify, apply, and reorder/expand switch statements in code.
2. An explanation of switch statements and how they can simplify decision-making compared to if statements.
3. An example of a switch statement written in Java that takes an integer representing a month and prints the corresponding month string. Learners are challenged to complete this code by adding the remaining months.
4. Another coding challenge where learners must correct errors in code for a rock-paper-scissors game to make it run properly. An extension challenge is provided to allow computer gameplay against a human.
The Ultimate Question of Programming, Refactoring, and EverythingPVS-Studio
Yes, you've guessed correctly - the answer is "42". In this article you will find 42 recommendations about coding in C++ that can help a programmer avoid a lot of errors, save time and effort. The author is Andrey Karpov - technical director of "Program Verification Systems", a team of developers, working on PVS-Studio static code analyzer. Having checked a large number of open source projects, we have seen a large variety of ways to shoot yourself in the foot; there is definitely much to share with the readers. Every recommendation is given with a practical example, which proves the currentness of this question. These tips are intended for C/C++ programmers, but usually they are universal, and may be of interest for developers using other languages.
The Ultimate Question of Programming, Refactoring, and EverythingAndrey Karpov
Yes, you've guessed correctly - the answer is "42". In this article you will find 42 recommendations about coding in C++ that can help a programmer avoid a lot of errors, save time and effort. The author is Andrey Karpov - technical director of "Program Verification Systems", a team of developers, working on PVS-Studio static code analyzer. Having checked a large number of open source projects, we have seen a large variety of ways to shoot yourself in the foot; there is definitely much to share with the readers. Every recommendation is given with a practical example, which proves the currentness of this question. These tips are intended for C/C++ programmers, but usually they are universal, and may be of interest for developers using other languages.
This document outlines topics to cover in an MVC content course, including an introduction to MVC and why it is preferred over webforms, jQuery introductions and features, common MVC controls like textboxes and dropdowns, and how to create and access Web API services. It will conclude with a real-world layered MVC application example to demonstrate the concepts.
The if statement allows for conditional execution of code based on whether an expression evaluates to true or false. The else clause defines an alternative block of code to execute if the expression is false. The else if clause allows testing multiple expressions. The switch statement evaluates an expression and executes different code for different case results.
This document discusses how to set up remote debugging of a Java application from Eclipse. It explains that the debugee (Java application) needs to be run with JDWP options to enable debugging, including suspending the application at startup. The debugger (Eclipse) then connects to the debug port to inspect and control the debugee. An example Java application is provided that toggles a button color when clicked, which can be remotely debugged from Eclipse.
Refactoring legacy code driven by tests - ENGLuca Minudel
re you working on code poorly designed or on legacy code that’s hard to test? And you cannot refactor it because there are no tests?
During this Coding Dojo you’ll be assigned a coding challenge in Java, C#, Ruby, JavaScript or Python. You will face the challenge of improving the design and refactoring existing code in order to make it testable and to write unit tests.
We will discuss SOLID principles, the relation between design and TDD, and how this applies to your solution.
Reading list:
Growing Object-Oriented Software, Guided by Tests; Steve Freeman, Nat Pryce
Test Driven Development: By Example; Kent Beck
Working Effectively with Legacy; Michael Feathers
Agile Software Development, Principles, Patterns, and Practices; Robert C. Martin (C++, Java)
Agile Principles, Patterns, and Practices in C#; Robert C. Martin (C#)
The document discusses how tests can become messy if certain principles are not followed. It begins with a story of a junior developer writing their first test code, which quickly becomes complicated by dependencies on global states and logging. This leads to brittle, non-isolated tests. The document emphasizes that testable code is not always good code, and production code should not be modified to enable tests. It promotes writing code that is loosely coupled and follows principles like dependency injection to be properly testable. Tests themselves can become messy if they violate DRY and KISS principles through duplication and overcomplication.
Getting Started with ASP.NET MVC 3 and RazorDan Wahlin
This document provides an overview and introduction to ASP.NET MVC 3 and the Razor view engine. It describes the MVC pattern, key features of ASP.NET MVC 3 including Razor, and how to get started with an ASP.NET MVC 3 project using Razor views. The document also includes an agenda, explanations of the MVC components and Razor syntax, and recommendations for additional resources.
Neha Singhal presented on how Adobe used the Jasmine testing framework and their Project AutoMock tool to improve their testing process. Through adopting test-driven development with Jasmine, Adobe reduced bugs found by QA by over 90%, regression bugs to 0, and cut bug fixing time from around 14 days to 3 days. Project AutoMock automatically captures and mocks API requests and responses to allow tests to run faster without network calls or needing to manually stub responses. It integrates with frameworks like React, Angular and Backbone and significantly speeds up testing by removing the need for async tests of API calls.
Project AutoMock and Jasmine: Testing Auto-magically!!harshit040591
This document discusses how Adobe used the Project AutoMock and Jasmine testing framework to improve their testing process and reduce bugs. It introduced Neha Singhal and provided an overview of Adobe's journey toward more automated testing. Key metrics showed significant reductions in bugs, regression bugs, integration bugs, and dead code after implementing Test Driven Development and Project AutoMock, which automatically captures and mocks API requests to speed up testing without making actual calls.
Create first android app with MVVM Architecturekhushbu thakker
This pdf is about how to create the first application in the android
-How to do clean code
-What is the MVVM Architecture design pattern and why required architecture in app.
The Razor syntax supports the Visual Basic language. Razor code blocks are enclosed in @{ ... } and inline expressions start with @. Variables are declared with var and strings use quotation marks. C# code is case sensitive and files have a .cshtml extension. Razor recognizes basic email and HTML syntax. Server-side comments use @* ... *@ syntax. Parentheses can make expressions explicit.
The document discusses the principles of progressive enhancement and provides examples of how to implement it. Progressive enhancement involves building web applications that provide basic functionality to all users and then enhance the experience for those with newer browsers and capabilities. It emphasizes testing for support before applying enhancements and avoiding the need to degrade functionality. This approach allows web applications to work for all users while taking advantage of newer features where available.
This document outlines best practices for writing maintainable JavaScript, as presented by Christian Heilmann at the Carsonfied online conference in September 2010. Heilmann discusses using libraries judiciously to fix browser support issues while avoiding mixing too many libraries. Other tips include separating concerns, building for extensibility, thoroughly documenting code, planning for performance, avoiding double maintenance, and distinguishing between live and development code. He provides examples of implementing progressive enhancement, form validation, and font loading to demonstrate these principles.
You should Know, What are the Common mistakes a node js developer makes?Surendra kumar
Do you know What are the common mistakes a node js developer makes?
If not, let’s discuss 4 types of mistakes you should know about while working with node JS.
https://goo.gl/CPywbe
This document introduces an 7-day tutorial to learn ASP.NET MVC in depth. Day 1 focuses on understanding why MVC is better than traditional ASP.NET Web Forms by addressing issues like performance problems and reusability with Web Forms. It includes two labs, one on controllers and one on views, followed by Q&A sections. The goal is to help readers learn MVC step-by-step over the course of the week-long tutorial.
The document discusses coding standards and conventions for collaborative Java development. It outlines general principles like adhering to style and least astonishment. It also describes specific formatting, naming, documentation, and programming conventions like using meaningful names, commenting code, making fields private, and exception handling best practices. Automated tools like Checkstyle and Eclipse formatters can help enforce standards but may require configuration. Additional standards for the class are on the website.
The document provides 8 tips for commenting code, including commenting each level of code, using paragraph comments to describe blocks of code, aligning consecutive line comments, avoiding obvious comments, being polite in comments, commenting while writing code, updating comments when updating code, and emphasizing readable code that requires fewer comments.
The document discusses using KnockoutJS with ASP.NET MVC. It introduces KnockoutJS as a JavaScript library for model-view-viewmodel separation and data binding. It then compares traditional ASP.NET MVC approaches to using KnockoutJS, noting pros and cons of each. It also demonstrates using Knockout mapping to tie Knockout view models to ASP.NET view models, and performing AJAX calls both within and outside the controller.
JavaScript is the most popular scripting language used on web pages. It can be used to add interactivity and dynamic content to HTML pages. JavaScript code can be embedded directly in HTML pages or stored externally in .js files. JavaScript code can be placed in the <head> or <body> sections of an HTML page. Common JavaScript statements include conditional statements like if/else, loops like for and while loops, and functions. JavaScript also provides popup boxes like alert, confirm, and prompt to interact with users.
This document provides coding challenges related to switch statements in Java. It includes:
1. Three coding challenges - to identify, apply, and reorder/expand switch statements in code.
2. An explanation of switch statements and how they can simplify decision-making compared to if statements.
3. An example of a switch statement written in Java that takes an integer representing a month and prints the corresponding month string. Learners are challenged to complete this code by adding the remaining months.
4. Another coding challenge where learners must correct errors in code for a rock-paper-scissors game to make it run properly. An extension challenge is provided to allow computer gameplay against a human.
The Ultimate Question of Programming, Refactoring, and EverythingPVS-Studio
Yes, you've guessed correctly - the answer is "42". In this article you will find 42 recommendations about coding in C++ that can help a programmer avoid a lot of errors, save time and effort. The author is Andrey Karpov - technical director of "Program Verification Systems", a team of developers, working on PVS-Studio static code analyzer. Having checked a large number of open source projects, we have seen a large variety of ways to shoot yourself in the foot; there is definitely much to share with the readers. Every recommendation is given with a practical example, which proves the currentness of this question. These tips are intended for C/C++ programmers, but usually they are universal, and may be of interest for developers using other languages.
The Ultimate Question of Programming, Refactoring, and EverythingAndrey Karpov
Yes, you've guessed correctly - the answer is "42". In this article you will find 42 recommendations about coding in C++ that can help a programmer avoid a lot of errors, save time and effort. The author is Andrey Karpov - technical director of "Program Verification Systems", a team of developers, working on PVS-Studio static code analyzer. Having checked a large number of open source projects, we have seen a large variety of ways to shoot yourself in the foot; there is definitely much to share with the readers. Every recommendation is given with a practical example, which proves the currentness of this question. These tips are intended for C/C++ programmers, but usually they are universal, and may be of interest for developers using other languages.
This document outlines topics to cover in an MVC content course, including an introduction to MVC and why it is preferred over webforms, jQuery introductions and features, common MVC controls like textboxes and dropdowns, and how to create and access Web API services. It will conclude with a real-world layered MVC application example to demonstrate the concepts.
The if statement allows for conditional execution of code based on whether an expression evaluates to true or false. The else clause defines an alternative block of code to execute if the expression is false. The else if clause allows testing multiple expressions. The switch statement evaluates an expression and executes different code for different case results.
This document discusses how to set up remote debugging of a Java application from Eclipse. It explains that the debugee (Java application) needs to be run with JDWP options to enable debugging, including suspending the application at startup. The debugger (Eclipse) then connects to the debug port to inspect and control the debugee. An example Java application is provided that toggles a button color when clicked, which can be remotely debugged from Eclipse.
Refactoring legacy code driven by tests - ENGLuca Minudel
re you working on code poorly designed or on legacy code that’s hard to test? And you cannot refactor it because there are no tests?
During this Coding Dojo you’ll be assigned a coding challenge in Java, C#, Ruby, JavaScript or Python. You will face the challenge of improving the design and refactoring existing code in order to make it testable and to write unit tests.
We will discuss SOLID principles, the relation between design and TDD, and how this applies to your solution.
Reading list:
Growing Object-Oriented Software, Guided by Tests; Steve Freeman, Nat Pryce
Test Driven Development: By Example; Kent Beck
Working Effectively with Legacy; Michael Feathers
Agile Software Development, Principles, Patterns, and Practices; Robert C. Martin (C++, Java)
Agile Principles, Patterns, and Practices in C#; Robert C. Martin (C#)
The document discusses how tests can become messy if certain principles are not followed. It begins with a story of a junior developer writing their first test code, which quickly becomes complicated by dependencies on global states and logging. This leads to brittle, non-isolated tests. The document emphasizes that testable code is not always good code, and production code should not be modified to enable tests. It promotes writing code that is loosely coupled and follows principles like dependency injection to be properly testable. Tests themselves can become messy if they violate DRY and KISS principles through duplication and overcomplication.
Getting Started with ASP.NET MVC 3 and RazorDan Wahlin
This document provides an overview and introduction to ASP.NET MVC 3 and the Razor view engine. It describes the MVC pattern, key features of ASP.NET MVC 3 including Razor, and how to get started with an ASP.NET MVC 3 project using Razor views. The document also includes an agenda, explanations of the MVC components and Razor syntax, and recommendations for additional resources.
Neha Singhal presented on how Adobe used the Jasmine testing framework and their Project AutoMock tool to improve their testing process. Through adopting test-driven development with Jasmine, Adobe reduced bugs found by QA by over 90%, regression bugs to 0, and cut bug fixing time from around 14 days to 3 days. Project AutoMock automatically captures and mocks API requests and responses to allow tests to run faster without network calls or needing to manually stub responses. It integrates with frameworks like React, Angular and Backbone and significantly speeds up testing by removing the need for async tests of API calls.
Project AutoMock and Jasmine: Testing Auto-magically!!harshit040591
This document discusses how Adobe used the Project AutoMock and Jasmine testing framework to improve their testing process and reduce bugs. It introduced Neha Singhal and provided an overview of Adobe's journey toward more automated testing. Key metrics showed significant reductions in bugs, regression bugs, integration bugs, and dead code after implementing Test Driven Development and Project AutoMock, which automatically captures and mocks API requests to speed up testing without making actual calls.
Create first android app with MVVM Architecturekhushbu thakker
This pdf is about how to create the first application in the android
-How to do clean code
-What is the MVVM Architecture design pattern and why required architecture in app.
The Razor syntax supports the Visual Basic language. Razor code blocks are enclosed in @{ ... } and inline expressions start with @. Variables are declared with var and strings use quotation marks. C# code is case sensitive and files have a .cshtml extension. Razor recognizes basic email and HTML syntax. Server-side comments use @* ... *@ syntax. Parentheses can make expressions explicit.
The document discusses the principles of progressive enhancement and provides examples of how to implement it. Progressive enhancement involves building web applications that provide basic functionality to all users and then enhance the experience for those with newer browsers and capabilities. It emphasizes testing for support before applying enhancements and avoiding the need to degrade functionality. This approach allows web applications to work for all users while taking advantage of newer features where available.
This document outlines best practices for writing maintainable JavaScript, as presented by Christian Heilmann at the Carsonfied online conference in September 2010. Heilmann discusses using libraries judiciously to fix browser support issues while avoiding mixing too many libraries. Other tips include separating concerns, building for extensibility, thoroughly documenting code, planning for performance, avoiding double maintenance, and distinguishing between live and development code. He provides examples of implementing progressive enhancement, form validation, and font loading to demonstrate these principles.
You should Know, What are the Common mistakes a node js developer makes?Surendra kumar
Do you know What are the common mistakes a node js developer makes?
If not, let’s discuss 4 types of mistakes you should know about while working with node JS.
https://goo.gl/CPywbe
This document discusses JavaScript as a scripting language that allows for dynamic web pages. It covers running JavaScript code using <script> tags, working with variables and data types, operators and expressions, conditional statements like if/else and switch, and loops. Key points include JavaScript being interpreted rather than compiled, adding JavaScript via embedded, inline, or external code, and using variables, comments, arithmetic, comparison, assignment and logical operators.
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.
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.
Top 7 Angular Best Practices to Organize Your Angular AppKaty Slemon
Learn about Angular best practices to improve the performance of your existing Angular application. Tried and tested clean code checklist for your Angular app.
The following slides summarize and curate most of the knowledge and patterns gathered to date on Node error handling.
Without clear understanding and strategy, Node error handling might be the Achilles heel of your app – its unique single-threaded execution model and loose types raise challenges that don’t exist in any other frameworks. Node by itself doesn’t provide patterns for critical paths like where to put error handling code, even worst it suggest patterns that were rejected by the community like passing errors in callbacks.
It covers topics like promises, generators, callbacks, unhandled exceptions, APM products, testing errors, operational errors vs development errors and much more
React web development can become a tricky job if not handled properly. If you are facing issues with the development process, these practices will help you!
Javascript Deofuscation A manual ApproachGregory Hanis
JavaScript Obfuscation has been used as a means to bypass Antivirus Engines for several years. With a rise in the number of Browser Exploits, the focus on detecting malicious JavaScript used in Web Pages has increased. This causes attackers to push the envelope of JS Obfuscation. This article will cover the concepts and techniques used in Obfuscating JS. A Manual Approach is presented which will help in reversing advanced obfuscations used in the latest Exploits as well. The purpose is to show the advantages of a Manual Approach over automated JS Unpackers. The reader is also introduced to Obfuscation features present in an Exploitation Framework, MSF.
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.
JavaScript is a scripting language that allows dynamic interactivity on websites. It was invented by Brendan Eich to provide dynamic functionality to HTML documents. JavaScript can be used for simple tasks like image galleries and button clicks, as well as complex applications, games, and animations. JavaScript itself is compact but can be extended through APIs, frameworks, and libraries to unlock additional functionality with minimal effort.
This document provides an introduction to JavaScript programming basics. It discusses what JavaScript is, where it is used, frameworks, writing code, using external files, variables, operators, arrays, control structures, and using JavaScript in HTML. The presentation was given by Ramananda M.S. Rao from Collaboration Technologies in Bengaluru, India.
Java 10 introduces JShell, which allows developers to quickly try out Java code snippets and operations without needing to compile full programs or write test classes. It provides an interactive interface for testing code. Java 10 also includes local variable type inference with "var", which allows declaring variables without specifying the type as long as the type is clear from the initialization value. This simplifies code. Other new features include parallel full garbage collection and application class data sharing to improve performance, but most new features are under the hood improvements rather than things developers directly use in programming.
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.
Switch case statements provide an alternative to long if/else statements when comparing a variable to multiple integral values. The basic format compares the variable to case values, executing code for a matching case. A default case handles non-matching values. Loops allow code to repeat, with for, while, and do-while loops. For loops initialize/update a variable and check a condition each repetition. While loops check a condition and repeat until it's false. Loops are useful for repeating tasks like displaying lists of data.
JavaScript is scripting/programming language. File Extension of JavaScript is ".js”. This extension can be catched by a number of applications including Windows Script Host, Dreamweaver MX, Notepad, Netscape Navigator, PavScrip, UltraEdit.
LabsLab8.htmlLab 8 Im Thinking of a NumberBefore yo.docxDIPESH30
Labs/Lab8.html
Lab 8: I'm Thinking of a Number
Before you begin this lab please review Javascript from the lecture notes.
This lab is meant to help you learn the rudiments of the Javascript programming language and understand something of how web pages use Javascript, well enough that you can write a basic Javascript program that implements a simple game. You will also begin to develop some appreciation of why programming is not entirely trivial. It really does require orderly thinking and meticulous attention to detail.
Please read these instructions before beginning the lab.
Please follow the instructions about program format, variable names, etc.
Please use the template in Part 3.
Please pay attention to syntax and grammar and language constructs.
You will have a better chance of success if you follow the highlighted hints. Things will work better if you do, and you may even find that programming is kind of fun, especially when your program works.
You can do this lab anywhere. Remember to post questions in the forum where you can get help from each other.Part 1: IntroductionPart 2: The Javascript LanguagePart 3: Writing your own Javascript ProgramPart 4: Finishing up
Part 1: Introduction - PREAMBLE 1
Programming languages provide a way to express computer algorithms in a form that is convenient for humans yet easily translated into a computer's machine language: programming languages are the way that we tell computers how to perform a task.
In the lecture notes, we have studied the very low-level instructions that the computer itself understands (for example, the Toy), and talked about a variety of programming languages, much easier for people to use, that are translated into machine instructions by programs like compilers and assemblers. There are many such languages, each with its own good and bad points, and often with noisy adherents and detractors.
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You'll also be able to better understand the Javascript pages that you encounter when you browse, and if you like, you'll be able to adapt and modify them for your own pages too.
There is an enormous amount of Javascript information on the Web, and thousands of books. You might start with this list of tutorials, or Google for "javascript tutorial".
Javascript has three major components:the Javascript language itselfbuilding blocks that you can use to create your programmethods that let your Javascript program inter ...
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13 javascript techniques to improve your code
1. 13 JAVASCRIPT TECHNIQUES TO IMPROVE
YOUR CODE
by Vikash Gupta | Aug 17, 2017 | Mobile development, Web Development | 0 comments
We all write codes in di erent ways with a di erent style and most of the times forgot
about standardization, let’s discuss JavaScript Techniques to Improve Your Code.
This post includes the top tips to write JavaScript code, that would make your code Apple of
one’s eye. This post is referred to both i.e. beginner to javascript as well as experienced
javascript developers.
For newbie javascript developers, Javascript is a client-side scripting language. If you want
to use it on server-side, you have to use some speci c framework like Nodejs. The World of
javascript has been changed since Nodejs framework has come into action.
For an experienced developer, you know that almost all web applications use Javascript
as primary, you should know about these tips. These tips will make your code clean.
Understand that, when I say clean code, that points to the code that is:
1. Easy to understand, no matter that code is given to some other developer.
2. Easy to maintain, means small changes can be made
U a
2. So, I am going to share these tips, that I have learned during development. These tips will
start with an easy to advanced level, So don’t be bored If you already know the starting
ones.
1. Uses of proper variable name:
This is the rst tip that you have to learn if you want to be the best developer. A variable
name should be relevant to the function. These are some convention I follow during
naming:
Variable and function names are written as camelCase.
Global variables are written in UPPERCASE.
Constants (like PI) written in UPPERCASE.
2. Uses of proper text-indent in code snippets:
Your code might have good logic with proper variable naming but there is a question. Is
the code easy to read? Giving a proper text-indent means providing right space in each
line.
There is some good example for it.
3. The power of comments:
The only thing that can make your code more reusable is the way you use comments for it.
If you don’t know how to write the proper comments, then your life as a programmer will
be in danger J. In above example, you can see. In the following tips, I will elaborate more
about comments.
4. No need to use var for multiple times:
3. 4. No need to use var for multiple times:
Exactly, There is no need to use ‘var’ to initialize multiple variables. Instead of, you can
initialize in following way-
5. The power of Comma Operator:
For making your code small, you can use comma operator in following way-
6. Use of ‘===’ instead of ‘==’
Most of the programmer know about it but somehow they always forget to use it. But it
makes a large di erence in what they code and lls their code like bugs.
For javascript newbies, ‘==’ is used in time of comparison, when you want to compare only
values, and use ‘===’ when you want to compare a variable value as well as its data type.
So use these comparison variables wisely.
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// Not Recommended
Var a=10;
Var b=7;
Var c=12;
// Recommended
Var a=10,
b=7,
c=12;
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// Standard way
var x=1,
x++,
y=100;
//I recommend
var x=1,
y=( x++,100 );
console.log(x); // x will be equal to 2.
console.log(y);// y will be equal to 100;
4. For example- For javascript, if(‘1’==1) statement will return true value and if(‘1’===1) returns
false.
7. Magic of ‘use strict’
This statement gives your code the power that you can’t use undeclared variables. This
makes your code hard to break and easy to maintain. You can use it as following at the
above of each program le-
8. Verify variable Before use:
Before using an argument passed to function, you should check its data type. Otherwise,
your code will break. There is a javascript function to check each and every data type
named ‘type of’. You can use it in following way-
For more information, go to https://developer.mozilla.org/en-
US/docs/Web/JavaScript/Reference/Operators/typeof.
9. Use for loop in an optimized way:
A normal for loop looks like this, but this doesn’t mean that we should do it in exactly the
same way. We all should avoid this syntax and try as following-
1 “use strict”;
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// for Number check as
type of (input)===’number’
// for string check as
Type of (input)===’string’
// for Boolean check as
type of (input)===’boolean'
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for(var i=0;i< array.length;i++){
//Some Code
}
5. As per this above loop, the instantiation of i and length variable is done exactly one time
that makes your code fast.
10. Use of Comparison operators
This is the normal way, you perform a conditional statement. But with help of conditional
operators like ‘&&’ and ’| |’, we can simplify our code more as following way-
11. Use of switch case
I have seen in programs that in the case of multiple conditional statements, they use a
series of the nested if-else statement. That does execute correctly, but it looks somehow
clumsy or hard to understand. So in that condition, we should use switch case statements.
For more information on switch-case, go to https://www.w3schools.com/js/js_switch.asp.
12. Uses of Immediately Invoke function expression(IIFE)( Self-calling
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for(var i=0; length=array.length,i<length;i++){
// Some code
}
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var a;
If(!a){ // if a do not exists
a=’India’;
}
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// I Recommended as
var a;
a=””||”India”;
You can use ‘&&’ in following way-
// A Standard Way
If(a){ // if a exists
Console.log(‘America will grow’);
}
// But you can do as
a && console.log(‘America will grow’);
6. 12. Uses of Immediately Invoke function expression(IIFE)( Self-calling
function)
An IIFE is a function that executes automatically where you create them in the program.
They don’t have any name.
13. Use Javascript tools
At the end, there are a number of websites that you can to make your code beautiful and
error free. I will point to these three pillars, that helped me a lot.
1. https://codebeautify.org/jsvalidate
This website will help you with javascript validation as well as with proper text-indent.
2. http://lisperator.net/uglifyjs/
This website will help you to provide a mini ed le of your javascript code.
3. http://jshint.com/
This website will provide you a complete analysis of your code with a description,
warnings, and errors.
Conclusion:
Now you know how to improve your code with help of Javascript techniques. These
javascript tips not only make your code look clean but also make easy to understand, fast
and optimized.
Habilelabs is a premier software product development and IT-service provider company.
We provide best web based and mobile App solutions.
Hope you found this post pretty useful, So don’t forget to share this post.
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var response = (function(){
var x = 0; // in the scope of this function
return function(y){
x += y;
return x;
};
})();
alert(response(10)); //10
alert(response(11)); //21
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7. Please add what technique I missed in this post and what is common mistakes you did
most of the times while coding, share with us in the comment.
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