Example usage of AwaitAll

main.go

package main

import (
	"errors"
	"fmt"
	"math/rand"
	"strconv"
	"sync"
	"time"
)

type ExampleResponse struct {
	data string
	err  error
}

func main() {
	inputs := []int{3, 4, 5}

	responses := AwaitAll(inputs, func(input int) ExampleResponse {
		// Function can be sync or async as it is wrapped in a goroutine

		// Mock request to server each with different lengths
		randomTime := rand.Intn(5)

		time.Sleep(time.Duration(randomTime) * time.Second)

		// Error cannot be thrown, but must be in struct
		var err error

		if randomTime > 1 {
			err = errors.New("Request was too slow")
		}

		return ExampleResponse{
			data: strconv.Itoa(input),
			err:  err,
		}
	})

	// responses will be = []ExampleResponse{
	//   {data: "3", err: error or nil},
	//   {data: "4", err: error or nil},
	//   {data: "5", err: error or nil},
	// }
	fmt.Println(responses)
}