Question

js如何通过相同键值合并两个json数组

var arr1 = [
{
id:12,
name:20
},
{
id:13,
name:30
}
];
var arr2 = [
{
id:12,
title:500
},
{
id:13,
title:666
}
];
已知 arr1的长度和arr2相等,arr1和arr2含有相同的键值id,使用js如何得到sum
var sum = [
{
id:12,
name:20,
title:500
},
{
id:13,
name:30,
title:666
}
];

Answer 1

var arr1 = [{
    id: 12,
    name: 20
}, {
    id: 13,
    name: 30
}];
var arr2 = [{
    id: 12,
    title: 500
}, {
    id: 13,
    title: 666
}];
var sum = [];
for (var i = 0; i < arr1.length; i++) {
    var obj = {
        id: arr1[i].id,
        name: arr1[i].name,
        title: arr2[i].title
    };
    sum.push(obj);
}
console.log(sum);