| fun <T> T.toPrefixedString(prefix: String = "", suffix: String="") = prefix + this.toString() + suffix | |
| fun box() : String { | |
| if("mama".toPrefixedString(suffix="321", prefix="papa") != "papamama321") return "fail" | |
| if("mama".toPrefixedString(prefix="papa") != "papamama") return "fail" | |
| if("mama".toPrefixedString("papa", "239") != "papamama239") return "fail" | |
| if("mama".toPrefixedString("papa") != "papamama") return "fail" | |
| if("mama".toPrefixedString() != "mama") return "fail" | |
| return "OK" | |
| } |