hamming.go

package hamming

import (
	"errors"
)

// Distance calculates the Hamming distance between two strings
func Distance(a, b string) (int, error) {
	if len(a) != len(b) {
		return 0, errors.New("Not same length")
	}
	var distance = 0
	brunes := []rune(b)

	for i, achr := range a {
		bchr := brunes[i]
		if achr != bchr {
			distance++
		}
	}

	return distance, nil
}