How to conditionally select array or array of objects in Javascript ?

jav7zaid — Mon, 21 Jun 2021 18:18:18 +0000

If you have ever come across a use case where you have multiple arrays like below,

const array1 = [1,2,3];
const array2 = [4,5,6];
const array3 = [{ a: 1 }, { b: 2 }];

What if you want the resultant array to conditionally include one or more arrays, one way to do it

const arrayWeWant = [];

if(condition1) {
 arrayWeWant.push(array1);
}

if(condition2) {
 arrayWeWant.push(array2);
}

if(condition3) {
 arrayWeWant.push(array3);
}

well that's not a bad approach, but we can do better

const arrayWeWant = [
  ...(condtion1 ? array1 : []),
  ...(conditon2 ? array2 : []),
  ...(conditon3 ? array3 : [])
];

It's a much cleaner way isn't it.

Happy to share!😊

DEV Community: jav7zaid

How to conditionally select array or array of objects in Javascript ?