quii

object LetterCounter extends App{
    val filters = args.lift(1).getOrElse("aeiou").toList
    val grouped = args(0).groupBy(l=>l).collect{case (l,g) => (l, g.length)}
    val groupCount = filters.map(v => grouped.find(x=> x._1==v).getOrElse((v,0)))
    val output = groupCount.foldLeft("")((result, pair) => result+pair._1 + ": "+pair._2+" ")

    println(output)
}

quii

func Stitcher(hello_url string, worldURL string) string {
	return ""
}

quii

// Stitcher calls the Hello and World APIs to create a very useful string
func Stitcher(helloURL string, worldURL string) string {
	return ""
}

quii

package main

import (
	"fmt"
	"net/http"
	"net/http/httptest"
	"testing"
)

func Test_it_calls_the_services_and_concatenates_the_results(t *testing.T) {

quii

package main

import (
	"fmt"
	"io/ioutil"
	"net/http"
)

// Stitcher calls the Hello and World APIs to create a very useful string
func Stitcher(helloURL string, worldURL string) string {

quii

func Benchmark_the_stitcher(b *testing.B) {
	slowHelloAPI := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		time.Sleep(500 * time.Millisecond)
		fmt.Fprint(w, "Hello")
	}))

	slowWorldAPI := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		time.Sleep(500 * time.Millisecond)
		fmt.Fprint(w, "world")
	}))

quii

// Stitcher calls the Hello and World APIs to create a very useful string
func Stitcher(helloURL string, worldURL string) string {

	helloChannel := make(chan []byte, 1)
	worldChannel := make(chan []byte, 1)

	go func() {
		helloResponse, _ := http.Get(helloURL)
		defer helloResponse.Body.Close()
		helloContent, _ := ioutil.ReadAll(helloResponse.Body)

quii

const wordSeparator = ", "

// Stitcher calls the Hello and World APIs to create a very useful string
func Stitcher(helloURL string, worldURL string) string {

	helloChannel := make(chan []byte, 1)
	worldChannel := make(chan []byte, 1)

	go getStringFromAPI(helloChannel, helloURL)
	go getStringFromAPI(worldChannel, worldURL)

quii

func Test_it_handles_non_ok_from_hello_api(t *testing.T) {

	helloAPI := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		http.Error(w, "oops", http.StatusInternalServerError)
	}))

	worldAPI := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprint(w, "world")
	}))

quii

const wordSeparator = ", "
const errorMsg = "ALL OTHER SOFTWARE TEAMS ARE USELESS, OUTSOURCING IS A SHAM"

type apiResult struct {
	content string
	err     error
}

// Stitcher calls the Hello and World APIs to create a very useful string
func Stitcher(helloURL string, worldURL string) string {