ES6小技巧笔记
1:去重数组
let a = [1, 1, 2, 2, 3, 3, 4, 4, 5, 5]
let b = [...new Set(a)]
console.log(2222222222, b) // [1, 2, 3, 4, 5]
2:合并数组
let arr1 = ['a', 'b']
let arr2 = ['c']
let arr3 = ['d', 'e']
let arr4 = arr1.concat(arr2, arr3)
let arr5 = [...arr1, ...arr2, ...arr3]
console.log(111111111, arr4) // ["a", "b", "c", "d", "e"] ES5
console.log(222222222, arr5) // ["a", "b", "c", "d", "e"] ES6
3:反转数组
let a = '123456789'
console.log(111111, [...a].reverse().join('')) // "987654321" 字符串便数组仔反转再取数组放到字符串
4:字符串拼接
let name = 'Datura'
let age = 18
let sex = '其它'
let hobby = '敲代码'
let str1 = `名字${name},年纪${age},性别${sex},爱好${hobby},` // 注意此处有两个“ `` ”
console.log(111111, str1) // 名字Datura,年纪18,性别其它,爱好敲代码