Discussion on: Daily Challenge #44 - Mexican Wave

[Șerbu Vlad Gabriel]

Go:

func mexicanWave(s string) []string {
    if !utf8.ValidString(s) {
        panic("invalid string")
    }   
    // capacity can be replaced with len(s) if iterating over
    // the string twice is a bigger problem than allocating too
    // much memory
    ss := make([]string, 0, utf8.RuneCountInString(s))
    for i, r := range s {
        u := unicode.ToUpper(r)
        ss = append(ss, s[:i] + string(u) + s[i+utf8.RuneLen(r):])
    }
    return ss
}

Play with it here.