This presentation forms part of a tutorial on learning Javascript foundations. It is an introduction to the basic concepts of object oriented programming and using Javascript objects to organise code.
JavaScript language plays a very important role in Web 2.0 application development. JavaScript has its own characteristics different than object-oriented languages and it's not easy for developers to understand.
This presentation covers major advanced topics in JavaScript languages, including prototype chain, identifier resolving, "this" keyword, "new" operator, execution context and scope chain and closure. Besides that, it also covers best practices when using JavaScript.
Contents :
Language Concepts
How Objective C works- Basics
Data Types
NSInteger
NSNumber
Operators
Loop
Inheritance
Method Overloading
Mutable and Immutable Strings
Mutable and Immutable Arrays
File Management
JavaScript language plays a very important role in Web 2.0 application development. JavaScript has its own characteristics different than object-oriented languages and it's not easy for developers to understand.
This presentation covers major advanced topics in JavaScript languages, including prototype chain, identifier resolving, "this" keyword, "new" operator, execution context and scope chain and closure. Besides that, it also covers best practices when using JavaScript.
Contents :
Language Concepts
How Objective C works- Basics
Data Types
NSInteger
NSNumber
Operators
Loop
Inheritance
Method Overloading
Mutable and Immutable Strings
Mutable and Immutable Arrays
File Management
A class definition consists of two parts: header and body. The class header specifies the class name and its base classes. (The latter relates to derived classes and is discussed in Chapter 8.) The class body defines the class members. Two types of members are supported:
Data members have the syntax of variable definitions and specify the representation of class objects.
Member functions have the syntax of function prototypes and specify the class operations, also called the class interface.
Class members fall under one of three different access permission categories:
Public members are accessible by all class users.
Private members are only accessible by the class members.
Protected members are only accessible by the class members and the members of a derived class.
The data type defined by a class is used in exactly the same way as a built-in type.
iOS development Crash course in how to build an native application for iPhone.
i will be start from beginning till publishing on Apple Store step by step.
this session # 1 after the intro
A class definition consists of two parts: header and body. The class header specifies the class name and its base classes. (The latter relates to derived classes and is discussed in Chapter 8.) The class body defines the class members. Two types of members are supported:
Data members have the syntax of variable definitions and specify the representation of class objects.
Member functions have the syntax of function prototypes and specify the class operations, also called the class interface.
Class members fall under one of three different access permission categories:
Public members are accessible by all class users.
Private members are only accessible by the class members.
Protected members are only accessible by the class members and the members of a derived class.
The data type defined by a class is used in exactly the same way as a built-in type.
iOS development Crash course in how to build an native application for iPhone.
i will be start from beginning till publishing on Apple Store step by step.
this session # 1 after the intro
We have this new language, Swift, which takes some familiar Apple patterns, and introduces some new ones. With tools like closures and method chaining, there are definitely some new ways to solve the age-old Obj-c architecture challenges. This talk will walk through some of the most common Obj-c design patterns rewritten in Swift, and showcase the strengths and weaknesses of this new language.
While Google is adding Kotlin as an official Android language, we're also expanding our research on this language. It’s developed by JetBrains, and the fact that these are the people behind a suite of IDEs, such as IntelliJ and ReSharper, really shines through in Kotlin. It’s pragmatic and concise and makes coding a satisfying and efficient experience.
Although Kotlin compiles to both JavaScript and soon machine code, I’ll focus on its prime environment, the JVM.
Please see my presentation to learn more!
Java 8 is one of the largest upgrades to the popular language and framework in over a decade. This talk will detail several new key features of Java 8 that can help make programs easier to read, write, and maintain. Java 8 comes with many features, especially related to collection libraries. We will cover such new features as Lambda Expressions, the Stream API, enhanced interfaces, and more.
Java 8 is one of the largest upgrades to the popular language and framework in over a decade. This talk will detail several new key features of Java 8 that can help make programs easier to read, write, and maintain. Java 8 comes with many features, especially related to collection libraries. We will cover such new features as Lambda Expressions, the Stream API, enhanced interfaces, and more.
Since these presentations were spare time hobby - I've decided to share them :)
Hopefully someone will find them useful.
This part continues 1. part with more design patterns like Command, State, NullObject.
In JS: CLASS <=> Constructor FN
new FN() => FN() { this }
FN = CLASS (FN = FN, FN = DATA)
Objects
Prototype / __proto__
Inheritence
Rewriting / Augmenting
built in objects
JavaScript basics
JavaScript event loop
Ajax and promises
DOM interaction
JavaScript object orientation
Web Workers
Useful Microframeworks
This presentation has been developed in the context of the Mobile Applications Development course, DISIM, University of L'Aquila (Italy), Spring 2014.
http://www.ivanomalavolta.com
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2. what’s OO?
Object-oriented programming
(OOP) is a programming paradigm
that uses objects and their interactions
to design applications
source: wikipedia/Object Orientated
4. types
type examples
String ' Apples' quot;42quot;
primitive type
Number 42 3.12 -9
Boolean true false
Object { x: 100, y: 200 }
reference type
Array [' Apples', 42, 3.12]
Function function () { ... }
5. functions are like other types - we can
assign them to variables
function showMessage (msg) {
declare a named function
console.log(msg);
}
var showMessage = function (msg) {
declare a variable and assign it
console.log(msg);
an anonymous function
}
6. function showMessage (msg) {
console.log(msg);
}
showMessage('Goodbye');
create a reference to the
var showAnother = showMessage;
original function
showAnother('Hello');
Goodbye
Hello
7. showMessage Function
showAnother
call the
same
function
showAnother('Hello');
showMessage('Goodbye');
10. Object-oriented programming may be seen as a
collection of cooperating objects, as opposed to a
traditional view in which a program may be seen
as a group of tasks to compute (quot;subroutinesquot;).
Each object can be viewed as an independent little
machine with a distinct role or responsibility.
source: wikipedia/Object Orientated
11. radio
1.
volume
frequency
changeVolume ()
2.
changeTuner ()
1. properties - hold the state of an object
2. methods - provide the object with behaviour
14. var radio = {
volume: 0,
frequency: 88.0
};
add properties which will store the object state
15. var radio = {
volume: 0,
frequency: 88.0,
changeVolume: function (direction) {},
changeTuner: function (direction) {}
};
add methods which will give the object behaviour
16. var radio = {
volume: 0,
frequency: 88.0,
changeVolume: function (direction) {
if (direction === 'up') this.volume += 1;
else this.volume -= 1;
},
changeTuner: function (direction) {
if (direction === 'up') this.frequency += 4;
else this.frequency -= 4;
}
};
code the functionality that gives methods their behaviour
17. adjust the volume...
radio.changeVolume('up'); // volume is 1
radio.changeVolume('up'); // volume is 2
radio.changeVolume('up'); // volume is 3
radio.changeVolume('down'); // volume is 2
18. tune in...
radio. changeTuner('up'); // frequency is 92.0 Mhz
radio. changeTuner('up'); // frequency is 96.0 Mhz
radio. changeTuner('up'); // frequency is 100.0 Mhz
radio. changeTuner('up'); // frequency is 104.0 Mhz
radio. changeTuner('up'); // frequency is 108.0 Mhz
radio. changeTuner('down'); // frequency is 104.0 Mhz
19. radio
volume
frequency
changeVolume ()
changeTuner ()
models the real world object
encapsulates code in a single object
21. Review
functions, like objects, are a data type
OO approach:
- objects have roles and interact
- objects model the real world and are self-contained
object module:
- an object literal containing properies and functions
- allows you to structure code on object-oriented principles
22. homework!
r own
you
Build
radio
sistor
tran ome
s
arts
p
ed!!
clud
in