diff options
| -rw-r--r-- | typescript.html.markdown | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/typescript.html.markdown b/typescript.html.markdown index 3363426a..3da7bca2 100644 --- a/typescript.html.markdown +++ b/typescript.html.markdown @@ -83,8 +83,10 @@ class Point { //Properties x: number; - //Constructor - the public keyword is a shortcut to generate the code for a property and it's initialization, equivalent to "x" in this case - constructor(x: number, public y: number) { + //Constructor - the public/private keywords are shortcuts to generate the code for a property and its initialization + //Equivalent to "x" in this case + //Default values are also supported + constructor(x: number, public y: number = 0) { this.x = x; } @@ -95,7 +97,23 @@ class Point { static origin = new Point(0, 0); } -var p = new Point(10 ,20); +var p1 = new Point(10 ,20); +var p2 = new Point(25); //y will be 0 + +//Inheritance +class Point3D extends Point { + constructor(x: number, y: number, public z: number = 0) { + super(x, y); //Explicit call to the super class constructor is mandatory + } + + /Overwrite + dist() { + var d = super.dist(); + return Math.sqrt(d * d + this.z * this.z); + } +} + +//Modules //Generics |