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8-5.js
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31 lines (30 loc) · 934 Bytes
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/*建立Function的命名空間，在js檔被調用時就會註冊到當下環境*/
var extend = (function() {
for(var p in {toString:null}){
return function extend(o){
for(var i = 1; i < arguments.length; i++){
var source = argments[i];
for(var prop in source) o[prop] = source[prop];
}
return o;
};
}
return function patched_extend(o){
for(var i = 1; i < arguments.length; i++){
var source = arguments[i];
for(var prop in source) o[prop] = source[prop];
//
for(var j = 0; j < protoprops.length; j++){
prop = protoprops[j];
if (source.hasOwnProperty(prop)) o[prop] = source[prop];
}
}
return o;
};
var protoprops = ["toString", "valueOf", "constructor", "hasOwnProperty",
"isPrototypeOf", "propertyIsEnumerable", "toLocaleString"];
}());
function TestExtend(){
//var a = extend();
alert(extend);
}