javascript - Filter the original array of objects by array of ids

Question

I have two arrays:

array a:

var a = [
  {
    id: 1,
    name: 'a'
  },
  {
    id: 2,
    name: 'b'
  },
  {
    id: 3,
    name: 'c'
  }
];

array ids:

var ids = [1];

I want to array a filtered by array ids, result i wanted:

var a = [
  {
    id: 1,
    name: 'a'
  }
];

The most important thing is i want the change on the original array, rather than return a new array.

underscore solution is better:)

Answer 1

You can use .filter

a = a.filter(function(el){ 
    return ~ids.indexOf(el.id)
});

// should give you [{id: 1, name: 'a'}]