ransom_note.go

func canConstruct(ransomNote string, magazine string) bool {
    for _, v := range ransomNote {
        sym := string(v)
        ind, exists := searchInString(magazine, sym)
        if !exists {
            return false
        }
        magazine = magazine[:ind] + magazine[ind+1:]
    }
    
    return true
}

func searchInString(s string, target string) (int, bool) {
    for i, r := range s {
        if string(r) == target {
            return i, true
        }
    }
    return 0, false
}