Check if some object property exist in array of string typescript

Question

I have some array like this

const array1= ['A', 'B', 'C', 'D'];

const array2= [
{category: 'photos', code: 'A', fileName: '1664725062718.jpg', size: 120306},
{category: 'photos', code: 'F', fileName: '1664725062718.jpg', size: 120306},
{category: 'photos', code: 'K', fileName: '1664725062718.jpg', size: 120306},
];

I need some function that will check if any array member form array1 exist in code property of array2 and return true or false?

Something like this, of course this is just not working example?

array1.some(value => array2.includes(value))

array1.some(value => array2.find(obj => obj.code === value)) — Starfish
– Starfish, Commented Dec 5, 2022 at 14:45

k.tten · Accepted Answer · 2022-12-05 15:06:32Z

2

I think a clean way is to do the "opposite" and use some on array2, destructuring code from each object, and then checking if the code is in the first array.

const array1= ['A', 'B', 'C', 'D'];

const array2= [
{category: 'photos', code: 'A', fileName: '1664725062718.jpg', size: 120306},
{category: 'photos', code: 'F', fileName: '1664725062718.jpg', size: 120306},
{category: 'photos', code: 'K', fileName: '1664725062718.jpg', size: 120306},
{category: 'photos', code: null, fileName: '1664725062718.jpg', size: 120306},
];

// short-circuiting makes it shorter:
// console.log(array2.some(({ code }) => code && array1.includes(code)));
console.log(array2.some(({ code }) => code ? array1.includes(code) : false));

edited Dec 5, 2022 at 15:06

answered Dec 5, 2022 at 14:47

k.tten

26.8k4 gold badges34 silver badges63 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Miomir Dancevic Over a year ago

This is ok, but what is code is null, it will get error includes does nto accept null?

k.tten Over a year ago

@MiomirDancevic Check if it is null before using includes then

Miomir Dancevic Over a year ago

Please write answer that i can accept, thanks

Jared Smith Over a year ago

Probably worth at least noting that an array is a really poor choice of data structure for membership lookups. Array1 should really be an object or a set.

Collectives™ on Stack Overflow

Check if some object property exist in array of string typescript

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related