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split looks like a better choice than a regex. I whittled away at this and came up with the untested:
for (split(/:/, $$pattern)) { # make sure it starts and ends with spaces $_ = 'S0' . $_ unless /^S/; $_ .= 'S0' unless /S\d+$/; my @pieces = split(/[SF](\d+)/, $_); while (my ($spaces, $fills) = splice(@pieces, 0, 2)) { $out .= " " x $spaces . substr($camel, $camelcount, $fills); } $out .= "\n"; }
I'm fairly pleased with that, but might try to fit a pack in there. (How would you have used map?)

Aside, this:

while (/(.)/g) { $camel .= $1 if $1 ne " "; }
could be spelled:
tr/ //d; $camel .= $_;
I'm sure you can trim that down more, too. Don't forget to check out Acme::EyeDrops for a different take on things.

Update, very shortly after: You could, of course, just split on [SF] and probably get the same effect, though you'll have an empty element at the start. It may or may not be more clear that way.


In reply to Re: Reusing camel code by chromatic
in thread Reusing camel code by gmax

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