javascript 数组和对象遍历的问题

Question

var arr =[{id:1,name:'name1'},{id:4,name:'name2'},{id:5,name:'name3'}];

想把 arr这个数组最后变成下面对象的格式

obj ={1:'name1',4:'name2',5:'name3'};

怎么实现？

Answer 1

var arr =[{id:1,name:'name1'},{id:4,name:'name2'},{id:5,name:'name3'}]var obj = {};for(var i in arr){    var d = arr[i].name;    var e = arr[i].id;    obj[e] = d;    }low不

Answer 2

let obj = {};arr.forEach(a => obj[a['id']] = a['name']);console.log(obj);