Isomorphic Strings.go

func isIsomorphic(s string, t string) bool {
	if len(s) != len(t) {
		return false
	}

	var pairs = make(map[uint8]uint8)
	var reversePairs = make(map[uint8]uint8)
	for idx := range s {
		if v, ok := pairs[s[idx]]; ok {
			if v != t[idx] {
				return false
			}
		} else {
			if _, ok := reversePairs[t[idx]]; ok {
				return false
			}
			pairs[s[idx]] = t[idx]
			reversePairs[t[idx]] = s[idx]
		}
	}
	return true
}