Javascript -How remove item from nested object?

Question

I'm trying to remove an item from a nested object. object named "categories" that contains several categories and each category has several businesses. something like bellow object:

let categories = [{
  name: 'Home',
  biz: [{
    name: 'Business 1',
    id: 50
  }, {
    name: 'Business 2',
    id: 52
  }, {
    name: 'Business n',
    id: 53
  }]
}, {
  name: 'Car',
  biz: [{
    name: 'Business 1',
    id: 62
  }, {
    name: 'Business 2',
    id: 66
  }, {
    name: 'Business n',
    id: 67
  }]
}];

What I'm trying to do is removing one of this businesses that selected by user and return the whole object without mutating original state.

so far I did something like bellow and it's working fine bu I'm not sure if I'm doing this the right way or the wrong way. I appreciate if you guys help me by review or refactor this code:

categories.map((cat, inedx) => {
  return { ...cat, biz: [...cat.biz.filter(bz => bz.id!== 66)]}
});

Answer 1

reduce to the rescue :-)

const fn = (categories, id) => {
  return categories.reduce((r, x) => {
    return r.concat({ ...x, biz: x.biz.filter(x => x.id !== id) });
  }, []);
}

console.log(fn(categories, 66));

Answer 2

  let categories = [{ name: 'Home', biz: [{ name: 'Business 1', id: 50 }, { name: 'Business 2', id: 52 }, { name: 'Business n', id: 53 }] }, { name: 'Car', biz: [{ name: 'Business 1', id: 62 }, { name: 'Business 2', id: 66 }, { name: 'Business n', id: 67 }] }]; categories.forEach(el => el.biz = el.biz.filter(e => e.id !== 66)); console.log("removed biz 66", categories)