dewey92

import Vue from 'vue'
import VueRouter from 'vue-router'

Vue.use(VueRouter)
Vue.use(require('vue-resource'))

const router = new VueRouter({
    history           : true,
    saveScrollPosition: true
});

dewey92

<?php

$c = new \App\Base\Container();

/**
 * Register the CallableResolver we just wrote
 * to overwrite the default resolving behaviour of the Slim app
 */
$c['callableResolver'] = function ($c) {
    return new \App\Base\CallableResolver($c); // See number 04-CallableResolver.php

dewey92

const compose = (...fns) => x => fns.reduceRight((acc, fn) => fn(acc), x)

dewey92

const wedhus = compose(hargaKambing, diskon10, times3, add2)
// sama dengan
const wedhus = x => [hargaKambing, diskon10, times3, add2].reduceRight((acc, fn) => fn(acc), x)

// dan

const hasil = wedhus(77)
// sama dengan
const hasil = [hargaKambing, diskon10, times3, add2].reduceRight((acc, fn) => fn(acc), 77)

dewey92

const wedhus = x => [hargaKambing, diskon10, times3, add2].reduceRight((acc, fn) => fn(acc), x)

wedhus(77) = [hargaKambing, diskon10, times3, add2].reduceRight((acc, fn) => fn(acc), 77)

// STEP BY STEP
// Iterasi 1: fn = add2, acc = 77
wedhus(77) = [hargaKambing, diskon10, times3].reduceRight((acc, fn) => add2(77), 77)

// Iterasi 2: fn = times3, acc = add2(77)
wedhus(77) = [hargaKambing, diskon10].reduceRight((acc, fn) => times3(add2(77)), 77)

dewey92

const map = (fn, arr) => {
  const [head, ...tail] = arr
  
  if (tail[0] === undefined) return [fn(head)]

  return [fn(head), ...map(fn, tail)]
}

dewey92

const filter = (fn, arr) => {
  const [head, ...tail] = arr
  
  if (tail[0] === undefined) return []
  
  if (fn(head)) {
    return [head, ...filter(fn, tail)]
  } else {
    return [...filter(fn, tail)]
  }

dewey92

const reduce = (fn, init, arr) => {
  const [head, ...tail] = arr
  
  if (tail[0] === undefined) return fn(init, head)
  
  return reduce(fn, fn(init, head), tail)
}

dewey92

const length = arr => {
  const [head, ...tail] = arr
  
  if (tail[0] === undefined) return 1
  
  return 1 + length(tail)
}

dewey92

const Just = value => ({
  map: f => Just(f(value)),
  bind(f) { return this.map(f).join() },
  join: () => value,
  isJust: () => true,
  isNothing: () => false,
  orJust: _ => value
})

const Nothing = () => ({