var BaiduUsers = [], WechatUsers = []; var User = function(id, name, phone, gender, age, salary) { this.id = id; this.name = name; this.phone = phone; this.gender = gender; this.age = age; this.salary = salary; }; User.create = function(id, name, pho…

var BaiduUsers = [], WechatUsers = []; var User = function(id, name, phone, gender, age, salary) { this.id = id; this.name = name; this.phone = phone; this.gender = gender; this.age = age; this.salary = salary; }; User.create = function(id, name, pho…

var BaiduUsers = [], WechatUsers = []; var User = function(id, name, phone, gender, age, salary) { this.id = id; this.name = name; this.phone = phone; this.gender = gender; this.age = age; this.salary = salary; }; User.create = function(id, name, pho…

原文链接 https://segmentfault.com/q/1010000010075035 将下列对象数组中,工资大于1w的员工,增加到对象数组 WanSalary中 var BaiduUsers = []; var User = function(id, name, phone, age, salary) { this.id = id; this.name = name; this.phone = phone; this.age = age; this.salary = salary;…

在一次对后端返回的对象数组的操作时想通过indexOf()或者includes()的方法来实现对对象数组的去重但是行不通,因为用indexOf()返回的都是-1,一下记录两种对象数组(更具指定属性)去重的方法. ES6的Map方法 unique(arr,u_key) { let map = new Map() arr.forEach((item,index)=>{ if (!map.has(item[u_key])){ map.set(item[u_key],item) } }) return…

var a =[{name: 'Tom',age:20},{name: 'Tom2',age:22}] 现在给a数组中的第一个对象添加性别属性 a[0]['gender']='women' a[0]['address']="China" a[1].province="Jiangsu" 多添加了一些属性,是为了区别字符串单引号和双引号的, 用了.就不用中括号不用单引号 不用点 就要用中括号和单引号 上面是效果: 如果不小心,没有指定是数组中的第几个对象,直接对a数组符…

将下列对象数组,通过工资属性,由高到低排序 var BaiduUsers = [], WechatUsers = []; var User = function(id, name, phone, gender, age, salary) { this.id = id; this.name = name; this.phone = phone; this.gender = gender; this.age = age; this.salary = salary; }; User.create =…

一.JS声明对象或数组 JS对象:{ } JS数组:[ ] 对象 var b={m:'123',n:'abc'};alert(b.m);alert(b.n); 一维数组 var a=[1,2,3];alert(a[1]);alert(a.length); 二维数组 var ar = [ [ 'a' , 'b'],[ 4, 5 , 6 , 5 ],[ 7, 8 , 9 ] ];alert(ar[1].length); 对象跟数组结合 var b={m:[{f:'123'},{g:'abc'}],n…

JavaScript中Array 对象 JavaScript中创建数组有两种方式 (一)使用直接量表示法: var arr4 = []; //创建一个空数组var arr5 = [20]; // 创建一个包含1项的数组var arr6 = ["lily","lucy","Tom"]; // 创建一个包含3个字符串的数组//查看数组的length长度(也就是说,length可以重新给数组定义长度,比原来的长,后面加逗号:比原来的短,会把之前定义的数…

记录一个常见的面试题,javascript中对象的深度克隆,转载自:http://www.2cto.com/kf/201409/332955.html 今天就聊一下一个常见的笔试.面试题,js中对象的深度克隆.翻了下这个题目,在很多地方出现过,已经算一个老的题目了,但是每年的校招中总会考到,其实想想,这个题目考查的知识点还是蛮多的,尤其是对基础知识的考查.好了,闲话不多说,开始正题. 一.js中的对象   谈到对象的克隆,必定要说一下对象的概念.   js中的数据类型分为两大类:原始类型和对象类…