vue 两个数组判断是否有重复

Question

vue 两个数组判断是否有重复，有几种判断方式？
let arr1 = ['runoob', 'google']
let arr2 = ['jingdong', 'google', 'taobao']

Answer 1

let arr1 = ['runoob', 'google']
let arr2 = ['jingdong', 'google', 'taobao']

const newArr = [...arr1, ...arr2]
const uniqArr = [...new Set(newArr)]
if(newArr.length !== uniqArr.length) // 有重复

Answer 2

随便写两种

let arr1 = ['runoob', 'google']
let arr2 = ['jingdong', 'google', 'taobao']

//
console.log(arr1.some(r => arr2.includes(r)))

//
console.log(!arr1.every(r => !arr2.includes(r)))

//
console.log(arr1.filter(r => arr2.includes(r)).length)