Re: What does the dash before hash assignment means?

fun(-url => $httpRefer ); is not a “hash assignment.” The => symbol in this case is equivalent to a comma. Subroutine fun is being called with an argument-list containing two arguments: -url, and the value of $httpRefer.

Some subroutines are written to recognize and to assign particular meanings to parameters which begin with a dash, e.g. to disambiguate user-chosen arbitrary strings which otherwise might match “real” parameters for the function. (I, the author, decree that ... “Anything beginning with a dash is a literal.”) But, that is up to their authors, not Perl itself.

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Re^2: What does the dash before hash assignment means? by karlgoethebier (Abbot) on Sep 03, 2013 at 13:50 UTC
"...is not a hash assignment" It is. `#!/usr/bin/env perl + use strict; use warnings; print fun(-nose =>'cuke') . qq(\n); sub fun { my %args = @_; return $args{-nose}; } __END__ karls-mac-mini:monks karl$ ./fun.pl cuke` [download] ŤThe Crux of the Biscuit is the Apostropheť	[reply] [d/l]
Re^3: What does the dash before hash assignment means? by Corion (Patriarch) on Sep 03, 2013 at 13:57 UTC
Not really - the arguments to the function call construct a list: `-nose =>'cuke' # even-sized list` [download] The hash assignment happens here: `my %args = @_;` [download]	[reply] [d/l] [select]
Re^4: What does the dash before hash assignment means? by karlgoethebier (Abbot) on Sep 03, 2013 at 14:05 UTC
OK, thats true. Thanks, Karl ŤThe Crux of the Biscuit is the Apostropheť	[reply]