代碼如下: $defined = function (v) { return v != undefined; }
Class = function () { var base = {}; for (var k=0; k<arguments.length; k++) { //{{new arguments[k]() with custom constructor field. var o = arguments[k].prototype; o.constructor = arguments[k]; arguments[k].call(o); //}} for (key in o) base[key] = o[key]; } function Klass () { // for every class one object cache. var clso = null; function klass() { if (arguments.length<=0 && clso!=null) { // hit cache. return clso; } if ($defined(this.constructor.init)) { // use init() for class initialization. this.constructor.init.apply(this, arguments); } clso = this; } klass.prototype = base; return klass; } return Klass(); }
A = new Class(); A.init = function () { this.x = 400; this.y = 300; } B = new Class(A); B.init = function () { this.y = 200; this.z = 100; } C = new Class(B); C.init = function () {
