On Fri, Apr 03, 2015 at 03:24:09PM -0700, Kyle J. McKay wrote:

> >I thought that meant we could also optimize out the "map" call entirely,
> >and just use the first split (with "*") to end up with a list of $COLOR
> >chunks and single characters, but it does not seem to work. So maybe I
> >am misreading something about what is going on.
> 
> I think our emails crossed in flight...
> 
> Using just the first split (with "*") produces useless empty elements which
> I think ends up causing problems.  I suppose you could surround it with a
> grep /./ to remove them but that would defeat the point of the optimization.

Yeah, the problem is the use of (). We want to keep the $COLOR
delimiters, but not the empty ones. Perhaps you could do:

  split /($COLOR+)|/

but I didn't try it. I think what you posted is good and a lot less
subtle.

-Peff
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