Reduce Everything...

// Why the Hipsters Reduce Everything!

// Map implementation

import R from 'ramda'

const map = (f, data) =>
  R.reduce((xs, x) => {
    return [...xs, f(x)]
  }, [], data)

// Filter implementation

const filter = (f, data) =>
  R.reduce((xs, x) => {
    return f(x) ? [...xs, x] : xs
  }, [], data)

const data = [1, 2, 3, 4, 5]

console.log(map(x => x + 10, data))
console.log(filter(x => x > 3, data))