Re: Re: tic-tac-toe regex golf (bug)

[barrachois]

Yes, thank you.

That was just pointed out to me by someone else as well, and I've put an addendum and correction into the original post accordingly.

Following Dave's suggestion to use \w instead of X|O, the shortest I'm currently aware of is this 57 char regex which lists out the two .{2,3} cases explicitly.

 ^(...)*(\w)\2\2|^..(\w).\3.\3|(\w)..\4..\4|(\w)...\5...\5

[Anonymous Monk]

Sometimes it helps to anchor from the other side:

(\w)(..(\1|.\1.)..\1|.\1.\1..$|\1\1(...)*$)

This 43 also gets rid of all those ugly different digits, in favor of pleasing uniformity :)