// 示例用法/*var str1 = "tie, mao, 55";var str2 = "tie, mao, csdn";var result = diff(str1, str2, ','); // 对象var rs = "" + result;  // " 55, csdn"var df1 = result.diff1; // [" 55"]var df2 = result.diff2; // [" csdn"]*/// 比较2个字符串内元素的不同(字符1, 字符2, 分隔符可选)function diff(str1, str2, separator){	//	str1 = str1 || "";	str2 = str2 || "";	separator = separator || ",";	// arr中有ele元素	function hasElement(arr, ele){		// 内存循环		var hasItem1 = false;		for(var i2=0; i2 < arr.length; i2++){			//			var item2 = arr[i2] || "";			if(!item2){				continue;			}			//			if(ele == item2){				hasItem1 = true;				break;			}		}		return hasItem1;	};	function inAnotB(a, b){ // 在A中，不在B中		var res = [];		for(var i1=0; i1 < a.length; i1++){			var item1 = a[i1] || "";			if(!item1){				continue;			}			var hasItem1 = hasElement(b, item1);			if(!hasItem1){				res.push(item1);			}		}		return res;	};	//	var list1 = str1.split(",");	var list2 = str2.split(",");	//	var diff1 = inAnotB(list1, list2);	var diff2 = inAnotB(list2, list1);		// 返回结果	var result = {		diff1 : diff1		,		diff2 : diff2		,		separator : separator		,		toString : function(){			//			var res = this["diff1"].slice(0);			res = res.concat(this["diff2"]);			//			return res.join(this["separator"]);		}	};	//	return result;};