functional-javascript-workshop/exercises/implement_map_with_reduce/exercise.js

The basics of functional programming in JavaScript. No libraries required.

"use strict"

var runner = require('../runner')

function randomInt(min, max) {
  return Math.floor((Math.random() * (max - min)) + min)
}

var numbers = Array.apply(null, {length: Math.random() * 20 + 1}).map(function() {
  return randomInt(0, 9)
})

module.exports = runner.custom(function(map, numbers) {
  var result = []
  result.push('non-array entries', map(numbers, function(item) { return item * 3 }))
  result.push('array entries', map(numbers, function(item) { return [item * 3] }))
  return result
})(numbers)