Simple js helpers (range, log, logFunc)

helpers.js

const fib =
  n =>
    n < 2
      ? 1
      : fib(n - 1) + fib(n - 2)

const range =
  (min, max) =>
    Array(max - min + 1).fill().map((_, i) => i + min)

const log = value => console.log(value) || value
const logFunc = func => (...args) => log(func(...args))

const memoize =
  (func, mem = {}) =>
    (...args) => {
      const key = JSON.stringify(args);
      mem[key] = mem[key] || func(...args)
      return mem[key];
    }

const memfib = memoize(fib)
range(0, 10).forEach(logFunc(memfib))