SOURCE

let array = [
    {
        name: "1",
        age:1
    },
    {
        name: "2",
        age:2
    },
    {
        name: "3",
        age:3
    }
];
array.forEach((item,index) => {
    item.name = item.name+""+index;
})
console.log(array);
array.filter(item => {
    return item.age > 1;
})
console.log(array);
[1,2,3].forEach((value,index) => {
    console.log(value);
    array[index].age += value;
})
console.log(array);

let map = {a:array};
console.log(map);
map.a = map.a.filter(item => {
    return item.age > 3;
})
console.log(map);