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@joseanpg
Created August 15, 2012 21:55
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Extend and Merge (don't overwrite properties that reference objects)
(function(carrier){
var hasOwn = Object.prototype.hasOwnProperty;
var slice = Array.prototype.slice;
function extend(obj,src){
for (var p in src){
if (hasOwn.call(src,p)) {
if (p in obj && typeof obj[p] === 'object' && obj[p]) {
extend(obj[p],src[p]);
}
else {
obj[p] = src[p];
}
}
}
}
function merge(){
var result = {};
var args = slice.call(arguments,0);
for (var i=0, len=args.length;i<len;i++){
extend(result,args[i]);
}
return result;
}
carrier.extend = extend;
carrier.merge = merge;
})(this);
/*
var a = {};
var b = {a:'Hello', b:{}};
var c = {a:'Bye', b:{f:{d:2}}, c:1};
var r = merge(a, b, c);
alert(JSON.stringify(r,null,0)); //{"a":"Bye","b":{"f":{"d":2}},"c":1}
*/
@joseanpg
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You are right :)

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