Filter array based on sub array of objects properties

Question

Given the following array of objects, I'm trying to work out how to filter the top array based on the Event array having an object containing an ID of 30

var staff = [];
staff.push({
    Id: 122,
    Events: [
        {Id: 30,Name: "Foo"},
        {Id: 57,Name: "Bar"}
    ]});
staff.push({
    Id: 122,
    Events: [
        {Id: 57,Name: "Bar"}
    ]});

So far I've tried variations of the following:

$.grep(staff, function (item) {
    return item.Events.Id == 30
});

Any help would be greatly appreciated

Expected output:

var staff = [{Id: 122, Events: [{Id: 30,Name: "Foo"},{Id: 57,Name: "Bar"}]}];

michael · Accepted Answer · 2020-12-01 10:11:25Z

1

var staff = [];
staff.push({
  Id: 122,
  Events: [
    { Id: 30, Name: 'Foo' },
    { Id: 57, Name: 'Bar' }
  ]
});
staff.push({
  Id: 122,
  Events: [{ Id: 57, Name: 'Bar' }]
});

const res = staff.filter((item) => item.Events.some((e) => e.Id === 30));
console.log(res);

edited Dec 1, 2020 at 10:11

answered Dec 1, 2020 at 10:02

michael

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2 Comments

atoms Over a year ago

perfect thanks, makes sense needed to filter the inner object the same as the outer

Yoshi Over a year ago

staff.filter(item => item.Events.some(e => e.Id === 30)) would be a lot better here, as it would return early if a match is found.

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