Two reasons. One is that by default regex assumes utf8 and a. is not utf8. To disable that, you need to go: rxutf8 0
The other is that the regex implementation we are using assumes C strings, which are null terminated. So you need to get rid of any nulls if you want regex to go past them. 'a' rxmatch ' ' 0} a. 97 1 I hope this helps, -- Raul On Tue, Dec 22, 2015 at 8:29 PM, Ryan Eckbo <ec...@cim.mcgill.ca> wrote: > Why doesn't regex work on binary? > e.g. > > load'regex' > 'a' rxmatch a. > _1 0 > 'a' rxmatch AlphaNum_j_ > 26 1 > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
