Detailed explanation of jquery traversal and adding Json object code examples-JS Tutorial-php.cn

jquery method of dynamically traversing the properties and values of Json objects.

1. Traverse the attributes of the json object

//定义json对象 var person= { name: 'zhangsan', pass: '123', fn: function(){ alert(this.name+"的密码="+this.pass); } } //遍历person属性包括方法，如果不想显示出方法，可用typeof(person[item])== "function"来判断 for(var item in person){ alert("person中"+item+"的值="+person[item]); }

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2. Dynamically add attributes to the json object

You need to use the person object in 1

var copyPerson={} //创建copyPerson对象，将person中的属性包括方法copy给该对象 for(var item in person){ copyPerson[item]= person[item]; //这样循环就可以将person中的属性包括方法copy到copyPerson中了 } for(var item in copyPerson){ alert("copyPerson中"+item+"的值="+person[item]); }

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Note: Using Ext.apply(copyPerson, person) you can also copy all attributes including methods in person to copyPerson

3. Traverse the properties of ordinary js objects

//定义一个普通的js类，包含方法 var p= function (){ this.name= '李四'; this.pass= '456'; this.fn= function(){ alert(this.name+"的密码="+this.pass); } } var pp= new p(); //生成一个p类的对象 pp for(var item in pp){ //遍历pp对象中的属性，只显示出 非函数的 属性，注意不能 遍历 p这个类 if(typeof(pp[item])== "function") continue; alert("p对象中"+item+"的属性="+pp[item]); }

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Ordinary js objects can also be copied. The copy method has the same idea as 2. Dynamically adding attributes to the json object.

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