js去重

<script>let arr = [{ id: 0, name: "张三" },{ id: 1, name: "李四" },{ id: 2, name: "王五" },{ id: 3, name: "赵六" },{ id: 1, name: "孙七" },{ id: 2, name: "周八" },{ id: 2, name: "吴九" },{ id: 3, name: "郑十" },{ id: 3, name: "郑十", p: 'kkk' },];//对象数组去重function byReducesDeWeight(arr, prop) {let obj = {};return arr.reduce((res, next, index) => {// 排除无属性 如果不加next.hasOwnProperty(prop)会第一个始终被记入obj[next[prop]] ? "" : (obj[next[prop]] = true && next.hasOwnProperty(prop) && res.push(next))return res;}, [])}// console.log(byReducesDeWeight(arr, ''));//对象数组去重function byFilterDeWeight(arr, prop) {return arr.filter((now, index, list) => {return list.findIndex(el => (el[prop] && el[prop] == now[prop])) === index})}// console.log(byFilterDeWeight(arr, 'p'));let arr2 = [1, 2, 4, 5, 73, 3, 4, 3, 2]//简单数组去重 Setfunction bySetDeWeight(arr) {return [...new Set(arr2)] //或者  Array.from(arr2)}//简单数组去重 indexOffunction byIndexOfDeWeight(arr) {let ar = []arr.forEach(element => {ar.indexOf(element) == -1 && ar.push(element)});return ar}// 简单数组去重 includesfunction byIncludesSimbleDeWeight(arr) {let ar = []for (let i = 0; i < arr.length; i++) {!ar.includes(arr[i]) && ar.push(arr[i])}return ar;}// 双层循环function byForDeWeight(arr) {let ar = [...arr] //为啦不影响原数组for (let i = 0, len = ar.length; i < len; i++) {for (let j = i + 1; j < len; j++) {ar[i] == ar[j] && (ar.splice(j, 1), j--, len--)}}return ar}// console.log(byForDeWeight(arr2));// console.log(arr2);</script>