js对象的比较

Object.prototype.equals = function(obj){ 
if(this == obj) 
return true; 
if(typeof(obj)=="undefined"||obj==null||typeof(obj)!="object") 
return false; 
var length = 0; var length1=0; 
for(var ele in this) { 
length++; 
} 
for(var ele in obj) { 
length1++; 
} 
if(length!=length1) 
return false; 
if(obj.constructor==this.constructor){ 
for(var ele in this){ 
if(typeof(this[ele])=="object") { 
if(!this[ele].equals(obj[ele])) 
return false; 
} 
else if(typeof(this[ele])=="function"){ 
if(!this[ele].toString().equals(obj[ele].toString())) 
return false; 
} 
else if(this[ele]!=obj[ele]) 
return false; 
} 
return true; 
} 
return false; 
};

示例如下：

var p1 = {name:"jack",age:18}; 
var p2 = {name:"lucy",age:10}; 
var p3 = {name:"jack",age:18}; 
console.log(p1.equals(p2));//false 
console.log(p1.equals(p3));//true 
console.log(p1.equals({name:"jack",age:18}));//true