兩個數組根據相同id合併數組es6、原生js

對於兩個數組,有些場景,我們需要根據id,把一個數組的某些屬性,添加到另外一個數組.

        let arr1 = [
            {'id':1,'name':'高凱','age':10},
            {'id':2,'name':'張三','age':20},
            {'id':3,'name':'李四','age':30},
            {'id':4,'name':'趙武','age':10},
            {'id':5,'name':'王六','age':20},
        ];

        var arr2 = [
            {"id":1,"value":"111"},
            {"id":2,"value":"11111"},
            {"id":3,"value":"25462"},
            {"id":4,"value":"23131"},
            {"id":5,"value":"2315432"},
            {"id":6,"value":"333333"}
        ];

        var arr3 = [
            {"id":1,"name":"高凱","value":"111"},
            {"id":2,"name":"張三","value":"11111"},
            {"id":3,"name":"李四","value":"25462"},
            {"id":4,"name":"趙武","value":"23131"},
            {"id":5,"name":"王六","value":"2315432"},
            {"id":6,"value":"333333"}
        ];

        //對於數組arr1 和數組 arr2. 我們需要把數組arr1 裏面的name屬性以及值,根據id放在數組arr2 裏面.也就數組arr3的形式

es6的map方法

        arr2.map((item2)=>{
            arr1.map((item1)=>{
                if(item2.id == item1.id){
                    let json = {
                        'name':item1.name
                    };
                    Object.assign(item2,json);
                    return item2;
                }
            })
        })
         console.log(arr2);

原生的js方法

        for(let i = 0; i< arr2.length;i++){
            for(let j = 0;j< arr1.length;j++){
                if(arr2[i].id == arr1[j].id){
                    arr2[i].newAttr2 = arr1[j].name;
                }
            }
        }
        console.log(arr2);