Test for isogram

isogram.go

package isogram

import (
	"strings"
)

func IsIsogram(s string) bool {
	if s == "" {
		return false
	}
	// Create a map to store the unique characters
	d := make(map[rune]int)
	for _, r := range strings.ToLower(s) {
		// Set unique characters
		d[r] += 1
	}
	// Now we have a map of the unique characters
	// In order to get an Array of the keys, we loop
	var o []string

	for k, _ := range d {
		o = append(o, string(k))
	}
	// Array `o` now contains the unique strings
	// Check how many times the strings are repeated
	repeat := int(len(s) / len(o))

	// Now check if each unique characters have the same amount
	for _, v := range d {
		if v != repeat {
			return false
		}
	}

	return true
}