javascript declare array

Array method:About Slice:About Sort:"Arrayobject.sort (Method function)Method functions: Optional, specifies the sort order, which must be a function. If the If the "Method function:The function compares two values and returns a number that describes the relative order of the two values.The comparison function should have two parameters, a, B, and its return value is as follows: A return value of If the return value is >-1 A

This article mainly introduces the information about random sorting of arrays in the JavaScript study notes. For more information, see Recommended reading:Array Summation Method for JavaScript learning notes Add, delete, modify, and query the array of JavaScript learning notes The sort () and reverse () methods are pr

Today, I reviewed the JavaScript array and summarized some of his wonderful behaviors. I will share them with you on the script home platform. You are welcome to refer to the importance of arrays in programming languages, 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

This article mainly summarizes the array methods of javascript in detail, including the most commonly used array methods and extension methods. if you are interested, please refer to them. I. common methods of arrays 1: join (); Convert the array into a string for display. If you do not enter a parameter, a comma is

left child for(; left ) { //left is the right child. if(Left ] )) {left++;//take larger/smaller in the left and right child nodes } if((Ismax arr[cur] >= arr[left]) | | (!ismax Arr[cur] Arr[left])) { Break; } Else { //The original index follows the sort synchronizationchangepos (keys, cur, left); Changepos (arr, cur, left); } } } return+functio

Arrayobj.slice (0); Returns an array of copies, noting that a new array is not a pointer to theArrayobj.concat (); Returns an array of copies, noting that a new array is not a pointer to the 7, the ordering of array elements Arrayobj.reverse (); Reverse element (top to l

Summarizes various operations of Javascript on array objects, and summarizes javascript Array Array definition: in short, it is a group of ordered data sets. Its index is an integer that starts from 0 and naturally increases. Its element value can be any js data! It also con

The principle of associative (hash) arrays:Hash algorithm: Receive a string to calculate a number that is not duplicated as much as possibleDifferent strings, calculate the number as different as possibleThe same string, the calculated ordinal must be the sameWhen depositing data: The custom subscript name is given to the hash algorithm to calculate a sequence number that is as distinct as possible. The data to be saved is stored in the corresponding position of the serial number.When the data i

JavaScript is always used for Web pages, and JSON is always used with JavaScript. If you use it recently, write it.Here is a summary:1. Convert the array in JavaScript and {} into JSON string can use Json2.js, source address Https://github.com/douglascrockford/JSON-js.2. To convert a JSON string to a

( Colors.join (undefined)); Shown in IE7 and the following versions: red^undefinedgreen^undefinedblue^//If an item in the array has a value of null or undefined, the value is in join () \valueof () \tostring () \ toLocaleString () returns an empty string//var names = ["Zhangsan", null,undefined, "Lisi"];//alert (names); Zhangsan,,, Lisi//push (): Receives any number of arguments, adds to the end of the array