transducer-api-array-map-filter-reduce.js

const isEven = value => value % 2 === 0;

const mapFilterReduce = array =>
  // gets values from array
  array
    // transforms value to value + 1
    .map(value => value + 1)
    // ignores odd values
    .filter(isEven)
    // applies addition
    // starts from 0
    .reduce((sum, value) => sum + value, 0);

const ages = [16, 23, 24]
mapFilterReduce(ages)  // 24