>Having been a Perl programmer for several years now I have become >accustom to using the following as my normal "start" of any Perl script: > >#!/usr/bin/perl >use warnings; >use strict; > >Randal Schwartz uses this: > > #!/usr/bin/perl -w > use strict; > $|++; > >Is there any difference between the -w and "use warnings" declaration? >I know that both turn on warnings and the -w is commonly used at the >command line, but was just curious as to if one was "better" than the other.
"use warnings" only exists in Perl 5.004_05 or later. If you want your scripts to work in Perl interpreters earlier than that (the still prevalent 5.004_04), then you'll need to use "-w". Note: I may be slightly "what crack is he smoking?" on my version numbers - it's been a while.
I prefer "use warnings" myself - people really should try their damndest to update.
As for $|++, there was a recent debate (on Perlmonks.com, I believe) on how $|=1 may be a better visual choice than $|++. I haven't made up my mind either way - I still use ++ in my own scripts. Unfortunately, I couldn't find the Perlmonks.com link, so I may have just dreamt this.
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