iterating array in javascript

Some javascript code is very confusing. After constantly checking the information, I finally understood it! Haha! Method 1. js array definition and initialization Define a one-dimensional array Method 1: Var _ TheArray = new Array); // defines _ TheArray [0] = "1"; _ TheArray [1] = "2 "; _ TheArray [2] = "3"; // Init

This article mainly introduces how to use Object in JavaScript. prototype. toString determines whether it is an array. This article describes the Object. prototype. toString related knowledge, and provides the implementation code to judge the array. using this method, you can also determine other data types of javascrpty. if you need it, you can refer to why Obje

Examples of common JavaScript Array Usage Analysis and javascript instance analysis This article describes the common usage of JavaScript arrays. Share it with you for your reference. The details are as follows: Shows the running effect: The Code is as follows: I hope this article will help you design

Years ago in the rewrite Taobao shopping card script, inadvertently found an interesting thing. The code is similar: Copy Code code as follows: var associative_array = new Array (); associative_array["one"] = "1"; Associative_array["two"] = "2"; Associative_array["three"] = "3"; if (Associative_array.length > 0) {//To do} Will find that associative_array.length is always equal to 0, then a bit confused, and then know t

An example of JavaScript recursion to implement reverse array string, javascript Recursion Use JavaScript to sort string arrays. /*** Sort@ Param opt: String Array to be sorted*/Function sortString (opt ){If (! Opt) return;Var result = [], nresult = [],TempNum = 0, tempTNum

This article mainly introduces various common usage examples of JavaScript arrays, including common techniques such as array addition, deletion, replacement, and restoration, which are of great practical value, for more information about the common usage of JavaScript arrays, see the examples in this article. Share it with you for your reference. The details are

This article mainly introduces the simple implementation of javascript array Cloning. The example shows how to use concat in JavaScript for array cloning, for more information about how to clone javascript arrays, see the following example. We will share this with you for yo

The JavaScript array is randomly arranged to implement random shuffling and javascript shuffling. This article describes how to randomly shuffles JavaScript arrays. Share it with you for your reference. The specific analysis is as follows: This JS code can be used to randomly arrange the elements in the group. This i

Definition and use of arrays in javascript, javascript Array This article describes the definition and usage of arrays in javascript. Share it with you for your reference. The specific analysis is as follows: Copy codeThe Code is as follows: I hope this article will help you design

Array push is used to add elements to the end of an Array. In this lesson we'll see how push the method accepts multiple arguments, can is used to merge both arrays,.Push can accept multi args:ConstPets = ["Dog","Hamster"];p Ets.push ("Cat"); Console.log (pets); //["Dog", "hamster", "cat"]Pets.push ("Brid","Horse"); Console.log (pets); //["Dog", "hamster", "Cat", "Brid", "Horse"]Push can merge both arrays:c

You don't know about JavaScript-advanced full grasp of Item30 Array In programming languages, the importance of arrays is self-evident. arrays in JavaScript are also one of the most commonly used objects. arrays are ordered sets of values. Due to the weak type, arrays in JavaScript are flexible and powerful. arrays of

these days and learned a lot of the original knowledge, in the weekend summed up some JavaScript library-lodash (Array) of the content, I hope in the future learning from time to review and update themselves. The lodash-JavaScript Tool Library is very popular today, and here is a summary of some of the code I have for it :1._.chunk refers to the element that me

Translator Note: This article is about the ECMAScript 6 knowledge points, if you do not even understand the ES5. I must say, you are very behind. CSS4,HTML6, even ES7 ES8 have already begun planning, hurriedly shape move up, otherwise eliminated! Sometimes we need to expand an array into multiple elements and then take these elements as arguments to the function call. In JavaScript, you can use Function.pr

The sort method of the array sorting function in javascript. By default, the sorting is performed in ascending order of ASCII characters. Arrayobj. sort (sortfunction ); Parameter: sortFunction Optional. Is the name of the function used to determine the order of elements. If this parameter is omitted, the elements are listed in ascending order of ASCII characters. The sort method sorts