fast-replace/go-fast-replace/internal/pairs/pairs.go

package pairs

import (
	"fmt"
	"math/rand"
)

func MakePairs(n int) []string {
	var pairs []string
	for i := 1; i <= n; i++ {
		pairs = append(pairs, makeKey(i) + "," + makeValue())
	}

	return pairs
}

func makeKey(i int) string {
	return fmt.Sprintf("%06d", i)
}

func makeValue() string {
	var letters = []rune("ABCDEFGHIJKLMNOPQRSTUVWXYZ")
	var length int = len(letters)

	s := make([]rune, 6)
	for i := range s {
		s[i] = letters[rand.Intn(length)]
	}

	return string(s)
}