On Tuesday, 19 July 2016 at 12:30:49 UTC, celavek wrote:
final ulong[char] nucleotide_counts () const { return cached_counts; }
BTW you can find enumap useful https://forum.dlang.org/post/hloitwqnisvtgfoug...@forum.dlang.org if you want to have small associative arrays with enum keys.