empty function

This article mainly introduces in detail information about the methods for defining classes in javascript. you can refer to the following methods for defining classes in javascript: 1. factory mode The code is as follows: Function Car (){Var ocar

Today's work get to a few fragmented little knowledge points:1. $.noopThe function of jquery, which represents an empty function that needs to be used when passing an empty function, is better than function () {} In that it does not create an

Recently found in the Project $.noop () function, because previously did not use the query, now organized as follows:　　　　jQuery.noop()A function is an empty function , and it does nothing.When you need to pass in a function parameter at some point,

For php development, the empty function (note: In fact, empty is a language structure rather than a function. here, the function is just a personal habit) is a familiar function, the following is a description of the PHP Manual: Determine whether a

The following text: This article mainly introduces the PHP file read and write operation related function Summary, this article summarizes fwrite (), Fread (), fgets (), fgetc (), file (), ReadFile () and other functions of the introduction and use

There are many methods to judge whether a string is null in php, such as null = null, empty, and isset, which can be used to determine whether a variable or string is null, next I will introduce it to you. String; judge whether the string is null;

PHP's Isset () function is commonly used to detect whether a variable is set Format: bool Isset (mixed var [, mixed Var [, ...])Function: Detect whether the variable is setreturn value:Returns FALSE if the variable does not existReturns FALSE if

The error message "Fatalerror: Can & amp; rsquo; tusefunctionreturnvalueinwritecontext" is displayed in the empty function today. This function is strange. The error message "Fatal error: Can't use function return value in write context" is

Php null value _ PHP null value judgment when using php to write a page program, I often use a variable processing function to determine whether a variable value of a parameter at the end of the php page is null, at the beginning, I used to use the

As we all know, php is a weak type of language, so we must be rigorous in the development process at ordinary times. do not easily bury some low-level pitfalls. The empty () function should be used with caution. let's take a look at the following

This article mainly introduces the differences between PHP5.5 and the empty function of earlier versions. during development, note that if your local PHP development version is PHP5.5 or later, and the server is lower than PHP5.5, pay more attention

When using PHP to write a page program, I often use the variable handler function to determine the PHP page trailing parameters of a variable value is empty, at the beginning I used to use the empty () function, but found some problems, so instead

The main points of PHP code analysis a One. The difference between the post and the GET request mode: 1. Request form is different: Get request is to send data angle to the server at the end of the URL, post is sent to the server in a separate

Queue implementationUsing arrays to implement queues looks logical. Arrays in JavaScript have advantages that are not available in other programming languages, and the push () method of an array can add elements to the end of the array, and the

This article is published in the NetEase blog, feel relatively good, so summed up to learn!Steps to develop a custom control:1 Understanding how View works2 writing subclasses that inherit from view3 adding properties to a custom view class4 Drawing

Reprinted from: http://blog.163.com/[email protected]/blog/static/103242241201382210910473/To develop a custom control: 1, understand how view works 2, write subclass 3 Inheriting from view, add property 4 for Custom view class, draw control 5,

The design of the view structure of the Android system also adopts the combination mode, that is, the view as the base class of all the graphs, viewgroup the view inheritance into the views container class, thus obtains the basic structure of the

I. Concepts of prototype and __proto__Prototype is a property of a function (each function has a prototype property), and this property is a pointer to an object. It is a property that displays the prototype of the modified object.__proto__ is a

__proto__ of all constructors/functions point to Function.prototype, which is an empty function 123456789 Number.__proto__ === Function.prototype  // trueBoolean.__proto__ === Function.prototype // trueString.__proto__ ===

1. If a method C++an be static, declare it static. Speed improvement are by a factor of 4. If a method is static, it is statically declared. The rate can be increased to 4 times times.2. Echo is faster than print. echo is faster than print.3. Use