Javascript filter array by data from another

Question

I have an array object:

[
    { id:1, name: \'Pedro\'},
    { id:2, name: \'Miko\'},
    { id:3, name: \'Bear\'},
    { id:4, name: \'Teddy\'},
    { id:5, n         


        

Answer 1

Maybe take a Array.prototype.reduce in combination with an Array.prototype.some. This keeps the order of the given array need.

var data = [
        { id: 3, name: 'Bear' },
        { id: 4, name: 'Teddy' },
        { id: 5, name: 'Mouse' },
        { id: 1, name: 'Pedro' },
        { id: 2, name: 'Miko' },
    ],
    need = [1, 3, 5],
    filtered = need.reduce(function (r, a) {
        data.some(function (el) {
            return a === el.id && r.push(el);
        });
        return r;
    }, []);

document.write('
' + JSON.stringify(filtered, 0, 4) + '
');

To keep the order of data you can use Array.prototype.filter:

var data = [
        { id: 3, name: 'Bear' },
        { id: 4, name: 'Teddy' },
        { id: 5, name: 'Mouse' },
        { id: 1, name: 'Pedro' },
        { id: 2, name: 'Miko' },
    ],
    need = [1, 3, 5],
    filtered = data.filter(function (a) {
        return ~need.indexOf(a.id);
    });

document.write('
' + JSON.stringify(filtered, 0, 4) + '
');