wangatong的博客

function GetQueryString(name) { var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)"); console.log(window.location.search)//?id=2 var r = window.location.search.substr(1).match(reg); if (r != null) return unescape(r[2]); re

let script = document.createElement('script'); script.src = 'nezha.js'; document.head.appendChild(script);

Object.assign const target = { a: 1, b: 2 }; const source = { b: 4, c: 5 }; const returnedTarget = Object.assign(target, source); console.log(target); // expected output: Object { a: 1, b: 4, c: 5 } console.log(returnedTarget); // expected output: Objec

添加元素到数组的末尾 let fruits = ['Apple', 'Banana'] let newLength = fruits.push('Orange') // ["Apple", "Banana", "Orange"] 删除数组末尾的元素 let last = fruits.pop() // ["Apple", "Banana"] 删除数组头部元素 let first = fruits.shift() // ["Banana"] 添加元素到数组的头部 let newLength = fr

map有键名，键值相同，内存不同为不同2个键 let m=new Map([[1,"first"],[2,"second"]]); m.get(1);//first m.set(3,"third"); map数据结构方法有get,set,delete,has,clear,forEach,values,keys,entries

set结构跟数组类似，但set没有重复值 数组去除成员重复的方法 let array = [1, 2, 3, 4, 4] [...new Set(array)] const items = new Set([1, 2, 3, 4, 5, 5]); const array = Array.from(items); 去除字符串里面的重复字符 [...new Set('ababbc')].join('') 数组并集[1,2,3,4] let a = new Set([1, 2, 3]); let b = n