Using a little script I wrote to rename files, I encounter a funny
behavior with '|'. If the regular expressions share a part, doesn't
matter the order of those, The first match from the start of the input
is processed. Now that I'm writing this, it's seems obviously the
right behavior (and I think it is), for example:
% echo '123' | sed s'/12|12/o/g'
o3
% echo '123' | sed s'/23|12/o/g'
o3
But in large concatenations with strange characters like in:
$ echo '__-' | sed s'/_-|_-_|-_|__+ ... and a lot of more cra* ...
/__/g'
You could expect the output be '__', but it's '__-'
So... if you are a retard like me, don't try to be such smart and use
various sed commands.
trebol.