Re^2: Uninitialized Value $regex

can be written more succinctly ... See perlop#Logical-Defined-Or.

Yes, but not in perl versions older than 5.10 (released Dec 2007) / 5.9 (released Jul 2007), see perl5100delta /perl590delta. Older perl versions will likely see this as a syntax error. Unfortunately, this little detail is not documented in perlop. For someone new to Perl, perlop must read like defined-or was always present in Perl.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

Comment on Re^2: Uninitialized Value $regex

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Re^3: Uninitialized Value $regex by AnomalousMonk (Archbishop) on Jun 05, 2015 at 15:54 UTC
... not in perl versions older than 5.10 ... In any version of Perl, the command-line `perldoc perlop` (and other docs) can be a very welcome local feature sanity check. It's saved me wasted motion more than once. The on-line perlop (and on-line documentation in general) is tied to the most recent Perl version and is perhaps a bit overenthusiastic in presenting new features, but even this can be dialed back to previous versions (back to 5.8, IIRC). Give a man a fish: `<%-(-(-(-<`	[reply] [d/l] [select]
Re^4: Uninitialized Value $regex by choroba (Cardinal) on Jun 07, 2015 at 21:05 UTC
One of the reasons why Syntax::Construct exists. لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply]