``` val complements = CharArray('Z'.toInt()){ when...

# announcements

[egslava]

val complements = CharArray('Z'.toInt()){ when (it.toChar()){
    'A' -> 'T'
    'T' -> 'A'
    'G' -> 'C'
    'C' -> 'G'
    else -> '-'
}}

val Char.complement1: Char get() = complements[toInt()]