js中合并数组并去重

js中合并数组对象并去重

靠对象属性的唯一性去重

cutarray(arr) {
     let obj = {}; //obj用来记录该项重复出现了几次
     let brr = []; //brr是去重后的数组
     arr.forEach((item) => {
         if (obj[item.good_sku_id] == undefined) {
             obj[item.good_sku_id] = 1;
             brr.push(item);
         } else {
             obj[item.good_sku_id] += 1;
         }
     });
     return brr;
 },

使用

let cartList = [
    { good_sku_id:1,name:'张'},
    { good_sku_id:2,name:'王'},
    { good_sku_id:1,name:'张'}
] 
let newarr = this.cutarray(cartList)