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/**
* $class дÀ๤¾ßº¯ÊýÖ®Ò»
* @param {Object} constructor
* @param {Object} prototype
*/
function $class(constructor,prototype) {
var c = constructor || function(){};
var p = prototype || {};
c.prototype = p;
return c;
}

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//¹¹Ô캯Êý
function Person(name) {
this.name = name;
}
//Ô­ÐͶÔÏó
var proto = {
getName : function(){return this.name},
setName : function(name){this.name = name;}
}
//×é×°
var Man = $class(Person,proto);
var Woman = $class(Person,proto);

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console.log(Man == Woman);//true
console.log(Man.prototype == Woman.prototype);//true

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var man = new Man("Andy");
var woman = new Woman("Lily");
console.log(man instanceof Man);//true
console.log(woman instanceof Woman);//true
console.log(man instanceof Person);//true
console.log(woman instanceof Person);//true

okÒ»ÇÐÈçÎÒÃÇËùÆÚÍû¡£µ«ÊÇÓиöÎÊÌ⣬ÏÂÃæ´úÂëµÄ½á¹ûÊä³öfalse£¬
console.log(man.constructor == Person);//false

ÕâÈÃÈ˲»Ô㺴ÓÒÔÉϵĴúÂë¿´³ömanµÄÈ·ÊÇͨ¹ýManÀànew³öÀ´µÄ var man = new Man("Andy")£¬ÄÇô¶ÔÏóʵÀýmanµÄ¹¹ÔìÆ÷Ó¦¸ÃÖ¸ÏòMan£¬µ«ÎªºÎÊÂÓëÔ¸Î¥ÄØ£¿
Ô­Òò¾ÍÔÚÓÚ$classÖÐÖØÐ´ÁËPersonµÄÔ­ÐÍ£ºc.prototype = p;
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function $class(constructor,prototype) {
var c = constructor || function(){};
var p = prototype || {};
// c.prototype = p;
for(var atr in p)
c.prototype[atr] = p[atr];
return c;
}


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