var arr = [1, 2, 2, 3, 4]
var includes = arr.includes(2)
var map = arr.map(function (item) { return ++item })
var reduce = arr.reduce(function (prev, next) { return prev + next })
var some = arr.some(function (item) { return item === 4 })
var find = arr.find(function (item) { return item === 4 })
var findindex = arr.findindex(function (item) { return item === 2 })
console.log(include, map, reduce, some, find, findindex) //true [ 2, 3, 3, 4, 5 ] 12 true 4 1
如对本文有疑问, 点击进行留言回复!!
MFC的静态库.lib、动态库.dll(包含引入库.lib)以及Unicode库示例
CTF 刷题记录(一) 白云新闻搜索(手动与自动化SQL注入)
javascript如何使用函数random来实现课堂随机点名方法详解
网友评论