[LA.pm] C-style Perl vs. regex

[Jeremy Leader]

Peter Benjamin wrote:
> Do not use the concat operator of period, '.', as according
> to Larry, in chapters on perl optimization I have read,
> that period operator is slow.  The only time I use it is
> when I have to include an array or hash in a concatenation
> and the value is not first available in a temporary variable.
> For example:
> 
> print "debug echo \$thisvalue[$nv]='" . $thisvalue[$nv] . "'<br>\n";

I used to do this, until someone pointed out to me that the print
function can take a list of parameters, so you can use commas where
you have periods above:

print "debug echo \$thisvalue[$nv]='", $thisvalue[$nv], "'<br>\n";

which simple prints all the elements of the list, without having
to first concatenate them together into a temporary string.  Now
if you were assigning to a variable instead of printing, dot would
still be needed.

-- 
Jeremy Leader
jleader at alumni.caltech.edu
leaderj at yahoo-inc.com (work)