I posted a reply to the same post.
I was thinking a really lazy way to do this would be to make up a locale with just the ACGNT letters and then have to magic autoincrement operator just do the Right Thing.
use POSIX qw(locale_h);
#with all above working @twos would be AA AC AG AN AT CA CC CG etc.
So my question for the folks in the know is does the autoincrementer use locale?
Has anyone defined a DNA locale?
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