On Tuesday 22 Dec 2009 15:01:47 Jenda Krynicky wrote: > From: Marc Perry <marcperrys...@gmail.com> > > > I noticed that most beginner texts will introduce and use print like > > this: > > > > print $moose, $squirrel, $boris, "\n"; > > > > However, when I review code from CPAN, I often (typically) see: > > > > print $bullwinkle . $rocky . $natasha . "\n"; > > > > As I recall, print is a list operator (and therefore the comma syntax is > > used to separate items in a list), but is catenation somehow faster/more > > memory efficient? > > Compared with the price of the IO operation the concatenation versus > passing several values is irrelevant. I do not dare to guess which > one is more efficient in what circumstances, but I don't think the > difference matters. >
I should note that there's a small difference in behaviour. Reading from http://perldoc.perl.org/perlvar.html : <<<<<<<<<< # # IO::Handle->output_field_separator EXPR # $OUTPUT_FIELD_SEPARATOR # $OFS # $, The output field separator for the print operator. If defined, this value is printed between each of print's arguments. Default is undef. (Mnemonic: what is printed when there is a "," in your print statement.) >>>>>>>>>> Of course, setting it to anything but the default is a sure fire way to break practically most production code out there , and "Perl Best Practices" recommends against setting it. But it may be useful in one-liners / small scripts / golfs / obfuscations / etc. Regards, Shlomi Fish > Jenda > ===== je...@krynicky.cz === http://Jenda.Krynicky.cz ===== > When it comes to wine, women and song, wizards are allowed > to get drunk and croon as much as they like. > -- Terry Pratchett in Sourcery > -- ----------------------------------------------------------------- Shlomi Fish http://www.shlomifish.org/ Why I Love Perl - http://shlom.in/joy-of-perl Bzr is slower than Subversion in combination with Sourceforge. ( By: http://dazjorz.com/ ) -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
