Summary of related content about array iteration

This article mainly introduces the JavaScript array iteration method, which has a good reference value. Let's take a look at it with the editor. Recently, data processing is often involved in work. Arrays are especially common. They often need to be traversed and converted. Articles on the Internet are scattered here and there. I have no choice but to find the Little Red Book myself. Turn it out and read it, and make a note of it for future reference. Commonly used iteration methods for arrays ECMAScript5 defines 5 iteration methods for arrays. Each method accepts two arguments: a function fn to be run on each item and (optionally) a scope object to run the function on - affecting the value of `this`. The function (fn) passed into these methods will receive 3 parameters: item, index, array; such as: array.forEach(function(item,index,array){ //do your staff here; }, this) Depending on the usage method, the return value after execution of this function may or may not affect the return value in the method. These 5

1. JavaScript array iteration implementation method sharing

Introduction: This article mainly introduces the JavaScript array iteration method, which has a good reference value. Let’s take a look at it with the editor

2. A brief discussion on the use of foreach in PHP

##Introduction: There are many ways to use a loop to output the contents of an array in PHP. We can either use an array iteration loop, or of course, we can also use the following foreach method, It is the most used in daily development. Let's take a look at its usage first: //The syntax is: foreach(arrayName as key => value){//do something }//The following is a simple example code of mine:

##3.

Detailed introduction to the codes of 22 commonly used methods in JavaScript arrays

Introduction: As mentioned above, there are a total of 22 methods for arrays. This article divides them into object inheritance methods, array conversion methods, stacks and queues. Methods, array sorting methods, array splicing methods, subarray creation methods, array deletion methods, array position methods, array merge methods and array iteration methods, a total of 10 categories are introduced in detail. The object inheritance method array is a special object that inherits The toString(), toLocaleString() and valueOf() methods of the object Object [toString()] toString() method returns a string formed by concatenating the string form of each value in the array..

4.

XML operation of PHP extension (1)——SimpleXML

## Introduction: 1. Introduction and installation The SimpleXML extension provides a very simple and easy-to-use toolset that can convert XML into an object with general attribute selectors and array iterators. This extension requires the libxml PHP extension. This table...

5.

PHP uses SimpleXML to check whether the XML file structure is legal Example

Introduction: SimpleXML Functions allow you to convert XML into objects. This object can be processed just like any other object via ordinary property selectors or array iterators. SimpleXML functions are an integral part of PHP core. No installation is required to use these functions.

6.

Encountered an interview question about arrays

Introduction: Add 200,000 elements to the array, How to ensure the minimum memory overhead? The interviewer usually talks about tens of MB, but he can do 10MB. I can’t remember what he said. It was very vague. He seemed to be talking about array iteration and compression. Please tell me what’s going on. Did it?

7.

JS array iteration method_javascript skills

Introduction: This article mainly introduces the array iteration method of JS. It analyzes the related techniques of using array iteration in javascript with examples. The code is equipped with more detailed comments for easy understanding and has certain reference value. It is needed Friends can refer to

8. Detailed explanation of javaScript array iteration method_javascript skills

Introduction: This article mainly This article introduces the javaScript array iteration method in detail. ECMAScript5 defines 5 iteration methods for arrays. Interested friends can refer to

[Related Q&A recommendations]:

javascript - js array iteration method

javascript - WeChat 6.3.18 does not support the native array object iteration method?

php - Encountered an interview question about arrays

The above is the detailed content of Summary of related content about array iteration. For more information, please follow other related articles on the PHP Chinese website!