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Simple JSON And Deep Clone

09.19.2005
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Object.prototype.deep_clone = function(){
	eval("var tmp = " + this.toJSON());
	return tmp;
}
Object.prototype.toJSON = function(){
	var json = [];
	for(var i in this){
		if(!this.hasOwnProperty(i)) continue;
		//if(typeof this[i] == "function") continue;
		json.push(
			i.toJSON() + " : " +
			((this[i] != null) ? this[i].toJSON() : "null")
		)
	}
	return "{\n " + json.join(",\n ") + "\n}";
}
Array.prototype.toJSON = function(){
	for(var i=0,json=[];i<this.length;i++)
		json[i] = (this[i] != null) ? this[i].toJSON() : "null";
	return "["+json.join(", ")+"]"
}

String.prototype.toJSON = function(){
	return '"' +
		this.replace(/(\\|\")/g,"\\$1")
		.replace(/\n|\r|\t/g,function(){
			var a = arguments[0];
			return  (a == '\n') ? '\\n':
					(a == '\r') ? '\\r':
					(a == '\t') ? '\\t': ""
		}) +
		'"'
}
Boolean.prototype.toJSON = function(){return this}
Function.prototype.toJSON = function(){return this}
Number.prototype.toJSON = function(){return this}
RegExp.prototype.toJSON = function(){return this}

// strict but slow
String.prototype.toJSON = function(){
	var tmp = this.split("");
	for(var i=0;i<tmp.length;i++){
		var c = tmp[i];
		(c >= ' ') ?
			(c == '\\') ? (tmp[i] = '\\\\'):
			(c == '"')  ? (tmp[i] = '\\"' ): 0 :
		(tmp[i] = 
			(c == '\n') ? '\\n' :
			(c == '\r') ? '\\r' :
			(c == '\t') ? '\\t' :
			(c == '\b') ? '\\b' :
			(c == '\f') ? '\\f' :
			(c = c.charCodeAt(),('\\u00' + ((c>15)?1:0)+(c%16)))
		)
	}
	return '"' + tmp.join("") + '"';
}

var json = {
 str : "abcde",
 num : 6,
 reg : /foobar/i,
 array : [1,2,3,4,5],
 func : function(x,y){return x+y},
 obj : {a : "b"}
}.toJSON();

alert(json);
// result
{
 "str" : "abcde",
 "num" : 6,
 "reg" : /foobar/i,
 "array" : [1, 2, 3, 4, 5],
 "func" : function(x,y){return x+y},
 "obj" : {
 "a" : "b"
}
}
    

Comments

Snippets Manager replied on Tue, 2009/09/08 - 4:25pm

Another implementation that worked for me. var originalJSONObj = this.jsonPanelData.fieldList; //fieldList is the json object being passed from server side var clonedJSONObj = this.deepCloneJSON(originalJSONObj); //clonedJSONObj is the cloned object deepCloneJSON: function(obj) { var outpurArr = new Array(); for (var i in obj) { outpurArr[i] = typeof (obj[i]) == 'object' ? this.deepCloneJSON(obj[i]) : obj[i]; } return outpurArr; },