tags:

Array map/filter/reduce

Compose map, filter, and reduce to transform a list of numbers.

Author: chris

// Language: JavaScript

const nums = [1, 2, 3, 4, 5, 6];

const sumOfEvenSquares = nums
  .filter(n => n % 2 === 0)
  .map(n => n * n)
  .reduce((acc, n) => acc + n, 0);

console.log(sumOfEvenSquares);