27 lines
541 B
JavaScript
27 lines
541 B
JavaScript
class Point2D {
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constructor() {
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this.x = 1;
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this.y = 2;
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}
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}
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class Point3D extends Point2D {
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constructor() {
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super();
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this.z = 3;
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}
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}
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// ----------------------------------------------------------------------------
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var a = new Point2D();
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assert.isTrue(a.hasOwnProperty('x'));
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assert.isTrue(a.hasOwnProperty('y'));
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assert.isFalse(a.hasOwnProperty('z'));
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assert.isUndefined(a.z);
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var b = new Point3D();
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assert.isTrue(b.hasOwnProperty('x'));
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assert.isTrue(b.hasOwnProperty('y'));
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assert.isTrue(b.hasOwnProperty('z'));
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