Get values from an array of objects and check it on fly &

Question

const items = [{ price: 250 }, { price: -150 }, { price: 150 }, { price: 500 }];
let result = items.map(({ price }) => price);
console.log(result);

Is it possible to somehow embed a check in this place - items.map(({ price }) => price); - to check for a negative value, or do I need to do it again, map ?

UPD: I want to get summ of all numbers, except negative

Yes, you can check if it's negative... `price < 0 ? 'negative' : 'positive'` — CertainPerformance, Oct 01 '22 at 15:00
you want to get only negative numbers? then `.filter()` is a good option — Chris G, Oct 01 '22 at 15:01
See "[How to skip over an element in .map()?](/q/24806772/90527)" — outis, Nov 01 '22 at 20:17

Chris G · Accepted Answer · 2022-10-01T15:31:28.243

2

You can do it with .filter() method to get only the objects with negative values

const items = [{ price: 250 }, { price: -150 }, { price: 150 }, { price: 500 }];

const result = items.filter(val => {
  return val.price < 0;
});

console.log(result)

or It can be done like this in one line

const result = items.filter(val => val.price < 0);

edited Oct 01 '22 at 15:31

answered Oct 01 '22 at 15:05

Chris G

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Get values from an array of objects and check it on fly &

1 Answers1