Added section on Modules

Indented comments and edited the Interfaces part. Still missing indexers and Generics.
This commit is contained in:
Philippe 2014-08-27 15:41:12 +02:00
parent b5ccc1d83c
commit 0d022b14c0

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@ -18,7 +18,7 @@ var isDone: boolean = false;
var lines: number = 42; var lines: number = 42;
var name: string = "Anders"; var name: string = "Anders";
//When it's impossible to know, there is the "Any" type //..When it's impossible to know, there is the "Any" type
var notSure: any = 4; var notSure: any = 4;
notSure = "maybe a string instead"; notSure = "maybe a string instead";
notSure = false; // okay, definitely a boolean notSure = false; // okay, definitely a boolean
@ -50,40 +50,32 @@ interface Person {
name: string; name: string;
//Optional properties, marked with a "?" //Optional properties, marked with a "?"
age?: number; age?: number;
//And of course functions
move(): void;
} }
//Object that implements the "Person" interface
var p : Person = { name: "Bobby" }; //Can be treated as a Person since it has the name and age properties //..Object that implements the "Person" interface
//Objects that have the optional property: var p : Person = { name: "Bobby", move : () => {} }; //Can be treated as a Person since it has the name and age properties
var validPerson : Person = { name: "Bobby", age: 42 }; //..Objects that have the optional property:
var validPerson : Person = { name: "Bobby", age: 42, move: () => {} };
var invalidPerson : Person = { name: "Bobby", age: true }; //Is not a person because age is not a number var invalidPerson : Person = { name: "Bobby", age: true }; //Is not a person because age is not a number
//Interfaces can also define method signatures: //..Interfaces can also describe a function type
interface PersonWhoCanTalk {
sayHello(otherPersonsName: string): void;
}
//And also indexers, both with number and string
interface PersonWhoCanBeIndexed {
[index: number]: string;
}
//TODO
//Interfaces can also describe a function type
interface SearchFunc { interface SearchFunc {
(source: string, subString: string): boolean; (source: string, subString: string): boolean;
} }
//Only the parameters' types are important, names are not important. //..Only the parameters' types are important, names are not important.
var mySearch: SearchFunc; var mySearch: SearchFunc;
mySearch = function(src: string, sub: string) { mySearch = function(src: string, sub: string) {
return src.search(sub) != -1; return src.search(sub) != -1;
} }
//Classes //Classes - members are public by default
class Point { class Point {
//Properties //Properties
x: number; x: number;
//Constructor - the public/private keywords are shortcuts to generate the code for a property and its initialization //Constructor - the public/private keywords in this context are shortcuts to generate the code for a property
//Equivalent to "x" in this case //Equivalent to "x" in this case
//Default values are also supported //Default values are also supported
constructor(x: number, public y: number = 0) { constructor(x: number, public y: number = 0) {
@ -113,7 +105,23 @@ class Point3D extends Point {
} }
} }
//Modules //Modules, "." can be used as separators for sub modules
module Geometry {
export class Square {
constructor(public sideLength: number = 0) {
}
area() {
return Math.pow(this.sideLength, 2);
}
}
}
var s1 = new Geometry.Square(5);
//..Local alias for rreferencing a module
import G = Geometry;
var s2 = new G.Square(10);
//Generics //Generics