Re^2: Str extract the word between the first and the 2nd '|' character

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Re^3: Str extract the word between the first and the 2nd '\|' character by dani_cv (Acolyte) on Apr 11, 2008 at 14:39 UTC
What is the difference between declaring the variable from normal declaration "my $second_word" from the below declaration? my ( $second_word ) Thanks, Dan.	[reply]
Re^4: Str extract the word between the first and the 2nd '\|' character by kyle (Abbot) on Apr 11, 2008 at 14:56 UTC
These two do the same thing: `my $x; my ( $x );` [download] The second one is easier to add more variables to later. These are the same: `my $x ; my $y; my ( $x, $y ); # NOT: my $x, $y` [download] These two are a little different: `my $x = foo(); my ( $x ) = foo();` [download] The difference between them is that the second puts `foo()` in a list context while the first puts `foo()` in a scalar context. In this particular case (`my ($x) = $y =~ /(p)/`), the list context is important because that's how the captures come back. In a scalar context, you'd just get a boolean value to tell you whether the pattern matched.	[reply] [d/l] [select]
Re^4: Str extract the word between the first and the 2nd '\|' character by FunkyMonk (Bishop) on Apr 11, 2008 at 14:59 UTC
`$foo =~ m//` returns different thing depending on context. In scalar context it just returns true if $foo matched the regexp and false if it didn't. In list context it returns a list of the things captured by the regexp. Declaring a variable like `my ( $bar ) = ...` forces list context on the right-hand-side of '=', which, in this case forces the match to work in list context.	[reply] [d/l] [select]