Sometimes, we want to split an array into two arrays based on odd/even position with JavaScript.

In this article, we’ll look at how to split an array into two arrays based on odd/even position with JavaScript.

How to split an array into two arrays based on odd/even position with JavaScript?

To split an array into two arrays based on odd/even position with JavaScript, we can use the array filter method.

For instance, we write:

const arr = [1, 1, 2, 2, 3, 8, 4, 6]
const aOdd = arr.filter((_, i) => i % 2 === 1)
const aEven = arr.filter((_, i) => i % 2 === 0)
console.log(aOdd)
console.log(aEven)

to call arr.filter with (_, i) => i % 2 === 1 to return all the arr elements with odd indexes.

Likewise, we call arr.filter with (_, i) => i % 2 === 0 to return all the arr elements with event indexes.

i is the index of the element in arr.

Therefore, aOdd is [1, 2, 8, 6] and aEven is [1, 2, 3, 4].

Conclusion

To split an array into two arrays based on odd/even position with JavaScript, we can use the array filter method.