从数组中检索对象的最佳方法

Question

I have to 'filter' the ids of objects who's in array, I find this method but I think is not the best :

const idToCompare = 456

MyArray = [{name: 'One, brand: [{id: 456, name:'Hello'},{id: 857, name:'Hi'},{id: 456, name:'Goodbye'},{id: 123, name:'See you'}]} ]

so now I do:

let filtered = myArray.map(a => a.brand.filter(b => b.id === idToCompare))

Console.log(filtered ) // [[{id: 456, name:'Hello'},{id: 456, name:'Goodbye'}]]

I need to flat() it to have

filtered.flat()
Console.log(filtered ) // [{id: 456, name:'Hello'},{id: 456, name:'Goodbye'}]

How can I do in best way or a simple way ?

Answer 1

You could take Array#flatMap instad of Array#map .

 const array = [{ name: 'One', brand: [{ id: 456, name: 'Hello' }, { id: 857, name: 'Hi' }, { id: 456, name:'Goodbye'}, { id: 123, name: 'See you' }] }], idToCompare = 456, filtered = array.flatMap(({ brand }) => brand.filter(({ id }) => id === idToCompare)); console.log(filtered)