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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| // roughly based on https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes | ||
| // and https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/super | ||
| class Rectangle { | ||
| constructor(height, width) { | ||
| this.height = height; | ||
| this.width = width; | ||
| } | ||
|
|
||
| // Method | ||
| calcArea() { | ||
| return this.height * this.width; | ||
| } | ||
|
|
||
| static isACircle() { | ||
| return false; | ||
| } | ||
| } | ||
|
|
||
| var p = new Rectangle(4,3); | ||
| var ra = p.width==3 && p.height==4 && p.calcArea()==12 && !Rectangle.isACircle(); | ||
|
|
||
| // -------------------------------------------- | ||
|
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||
| class Cat { | ||
| constructor(name) { | ||
| this.name = name; | ||
| } | ||
| speak() { | ||
| return this.name + ' makes a noise.'; | ||
| } | ||
| static isDog() { | ||
| return false; | ||
| } | ||
| } | ||
|
|
||
| class Lion extends Cat { | ||
| speak() { | ||
| return super.speak()+this.name + ' roars.'; | ||
| } | ||
| static isReallyADog() { | ||
| return super.isDog(); | ||
| } | ||
| } | ||
|
|
||
| class Lion2 extends Cat { | ||
| constructor(name) { | ||
| super(name); | ||
| } | ||
| speak() { | ||
| return super.speak()+this.name + ' roars.'; | ||
| } | ||
| } | ||
|
|
||
| var c = new Cat("Tiddles"); | ||
| var l = new Lion("Alan"); | ||
| var l2 = new Lion("Nigel"); | ||
| var rb = c.speak()=="Tiddles makes a noise." && l.speak()=="Alan makes a noise.Alan roars." && l2.speak()=="Nigel makes a noise.Nigel roars." && Lion.isReallyADog()===false; | ||
|
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| // -------------------------------------------- | ||
|
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| result = ra && rb; | ||
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|