The sort() method of arrays in JavaScript is mainly used to sort the elements of the array. Among them, the sort() method has an optional parameter. However, this parameter must be a function. When calling the sort() method of an array, if no parameters are passed, the elements in the array will be sorted in alphabetical order (character encoding order). If you want to sort according to other criteria, you need to pass a parameter. Is a function that compares two values and returns a number that describes the relative order of the two values.
1. Sort the numerical array from small to large.
var arr = [22,12,3,43,56,47,4]; arr.sort(); console.log(arr); // [12, 22, 3, 4, 43, 47, 56],按照数字的第一个字排序的arr.sort(function (m, n) { if (m < n) return -1 //m < n 返回-1是从小到大排序,返回1是从大到小排序 else if (m > n) return 1 else return 0}); console.log(arr); // [3, 4, 12, 22, 43, 47, 56],按照数值大小排序
2. Perform a case-insensitive alphabetical sort on a string array
var arr = ['abc', 'Def', 'BoC', 'FED']; console.log(arr.sort()); // ["BoC", "Def", "FED", "abc"],按首个字母在ASIIC中出现的位置排序console.log(arr.sort(function(s, t){ var a = s.toLowerCase(); var b = t.toLowerCase(); if (a < b) return -1;//从小到大排序 if (a > b) return 1; return 0; })); // ["abc", "BoC", "Def", "FED"]
3. Sort an array containing objects, requiring descending order based on age in the object Sequential arrangement
var arr = [{'name': '张三', age: 26},{'name': '李四', age: 12},{'name': '王五', age: 37},{'name': '赵六', age: 4}];var objectArraySort = function (keyName) { return function (objectN, objectM) { var valueN = objectN[keyName] var valueM = objectM[keyName] if (valueN < valueM) return 1 //从大到小排序 else if (valueN > valueM) return -1 else return 0 } } arr.sort(objectArraySort('age')) console.log(arr) // [{'name': '王五', age: 37},{'name': '张三', age: 26},{'name': '李四', age: 12},{'name': '赵六', age: 4}]
The sort() method of arrays in JavaScript is mainly used to sort the elements of the array. Among them, the sort() method has an optional parameter. However, this parameter must be a function. When calling the sort() method of an array, if no parameters are passed, the elements in the array will be sorted in alphabetical order (character encoding order). If you want to sort according to other criteria, you need to pass a parameter. Is a function that compares two values and returns a number that describes the relative order of the two values.
1. Sort the numerical array from small to large.
var arr = [22,12,3,43,56,47,4]; arr.sort(); console.log(arr); // [12, 22, 3, 4, 43, 47, 56],按照数字的第一个字排序的arr.sort(function (m, n) { if (m < n) return -1 //m < n 返回-1是从小到大排序,返回1是从大到小排序 else if (m > n) return 1 else return 0}); console.log(arr); // [3, 4, 12, 22, 43, 47, 56],按照数值大小排序
2. Perform a case-insensitive alphabetical sort on a string array
var arr = ['abc', 'Def', 'BoC', 'FED']; console.log(arr.sort()); // ["BoC", "Def", "FED", "abc"],按首个字母在ASIIC中出现的位置排序console.log(arr.sort(function(s, t){ var a = s.toLowerCase(); var b = t.toLowerCase(); if (a < b) return -1;//从小到大排序 if (a > b) return 1; return 0; })); // ["abc", "BoC", "Def", "FED"]
3. Sort an array containing objects, requiring descending order based on age in the object Arrange in order
var arr = [{'name': '张三', age: 26},{'name': '李四', age: 12},{'name': '王五', age: 37},{'name': '赵六', age: 4}];var objectArraySort = function (keyName) { return function (objectN, objectM) { var valueN = objectN[keyName] var valueM = objectM[keyName] if (valueN < valueM) return 1 //从大到小排序 else if (valueN > valueM) return -1 else return 0 } } arr.sort(objectArraySort('age')) console.log(arr) // [{'name': '王五', age: 37},{'name': '张三', age: 26},{'name': '李四', age: 12},{'name': '赵六', age: 4}]
Related recommendations:
How to operate js arrays to remove duplicates
js array knowledge summary sharing
The above is the detailed content of JS array sorting. For more information, please follow other related articles on the PHP Chinese website!

去掉重复并排序的方法:1、使用“Array.from(new Set(arr))”或者“[…new Set(arr)]”语句,去掉数组中的重复元素,返回去重后的新数组;2、利用sort()对去重数组进行排序,语法“去重数组.sort()”。

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于Symbol类型、隐藏属性及全局注册表的相关问题,包括了Symbol类型的描述、Symbol不会隐式转字符串等问题,下面一起来看一下,希望对大家有帮助。

怎么制作文字轮播与图片轮播?大家第一想到的是不是利用js,其实利用纯CSS也能实现文字轮播与图片轮播,下面来看看实现方法,希望对大家有所帮助!

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于对象的构造函数和new操作符,构造函数是所有对象的成员方法中,最早被调用的那个,下面一起来看一下吧,希望对大家有帮助。

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于面向对象的相关问题,包括了属性描述符、数据描述符、存取描述符等等内容,下面一起来看一下,希望对大家有帮助。

方法:1、利用“点击元素对象.unbind("click");”方法,该方法可以移除被选元素的事件处理程序;2、利用“点击元素对象.off("click");”方法,该方法可以移除通过on()方法添加的事件处理程序。

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于BOM操作的相关问题,包括了window对象的常见事件、JavaScript执行机制等等相关内容,下面一起来看一下,希望对大家有帮助。

foreach不是es6的方法。foreach是es3中一个遍历数组的方法,可以调用数组的每个元素,并将元素传给回调函数进行处理,语法“array.forEach(function(当前元素,索引,数组){...})”;该方法不处理空数组。


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 Linux new version
SublimeText3 Linux latest version

Notepad++7.3.1
Easy-to-use and free code editor

Atom editor mac version download
The most popular open source editor

WebStorm Mac version
Useful JavaScript development tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
