withoutString

public String withoutStringProblem(String base, String remove, StringBuilder result, Integer lastIndexOf) {
        int startSubst = lastIndexOf != null ? lastIndexOf+remove.length() : 0;
        int indexOf = base.toUpperCase().substring(startSubst, base.length()).indexOf(remove.toUpperCase());
        if (indexOf != -1){
            if (!(startSubst == 0 && indexOf == 0)){
                result.append(base.substring(startSubst, startSubst+indexOf));
            }
            return withoutStringProblem(base, remove, result, startSubst+indexOf);
        }
        else{
            result.append(base.substring(startSubst, base.length()));
        }
        return result.toString();
    }
    public String withoutString(String base, String remove) {
        return withoutStringProblem(base, remove, new StringBuilder(), null);
    }