unset javascript object

Important knowledge points of PHP object-oriented (2 ). 1. _ toString: when an object is printed, if this method is defined by this class, the return value of this method is printed; otherwise, the result is printed based on the default PHP behavior.

1. _ toString: when an object is printed, if this method is defined by this class, the return value of this method is printed; otherwise, the result is printed based on the default PHP behavior. This method is similar to toString () in Java (). Copy

1. __tostring: When the object is printed, if the class defines the method, the return value of the method is printed, otherwise the print result is printed according to the default behavior of PHP. This method is similar to ToString () in Java.

Processing cookies in JavaScript is complicated because of its well-known interface, namely the doucmentcookie attribute of BOM. This attribute is unique in that it will show different behaviors in different ways. When used to obtain the property

One, array: Code:/*@desc：删除数组中的元素@param arr 原数组@param item 数组索引，只能是数字索引@param len 要删除的长度@return arr 删除元素后的数组*/function unset(arr,item,len = 1){arr.splice(item,len)return arr} Test:var arr = new Array(1,2,3,4)var ret =

A Brief Introduction to the Model and View source code of Backbone. js, backbone. jsmodel Backbone. Model Today, let's talk about Backbone. M and Model in js MVC are the core part of backbone, including the data displayed on the page, as well as

This article briefly introduces the Model of Backbone. js and the source code of the View. Backbone is a popular JavaScript MVC Framework. For more information, see Backbone. Model Today, let's talk about Backbone. M and Model in js MVC are the

Chapter 2 client Storage1. cookie① It was originally used to store session information on the client.1.1 restrictions① Cookie is bound to a specific domain name in nature. When a cookie is set and a request is sent to the domain name that creates it,

1. What is the definition of a variable? How do I check that a variable is defined? How do I delete a variable? How do I detect if a variable is set? $ defines whether the isset ()//check variable is setDefined ()//Detect constants are setUnset

The delete operator deletes an attribute from an object or an element from an array. Today, when reading prototype code, we found the delete operator. The Code is as follows: Unset: function (key ){Var value = this. _ object [key];Delete this. _