Re^2: " - " in the syntax

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Re^3: " - " in the syntax by cdarke (Prior) on Mar 06, 2009 at 09:48 UTC
You sure the - stringifies? Try this: `use strict; use warnings; use Data::Dumper; my %a = (-keys => 'v1', -values => 'v2'); print Dumper(\%a);` [download] Gives (as expected): `$VAR1 = { '-keys' => 'v1', '-values' => 'v2' };` [download] keys and values are (of course) builtins. When I replace the 'fat comma' with an ordinary one: `my %a = (-keys , 'v1', -values , 'v2');` [download] I get: `Not enough arguments for keys at C:\gash.pl line 6, near "keys ," Not enough arguments for values at C:\gash.pl line 7, near "values ,"` [download] It was the fat comma doing the stringification, not the -. Update: Re-reading the previous post, Anon did say "things that look like strings", which is correct. keys and values "look like" Perl builtins. Changing the names gives different results: `my %a = (-xkeys , 'v1', -xvalues , 'v2');` [download] Gives: `$VAR1 = { '-xvalues' => 'v2', '-xkeys' => 'v1' };` [download] Which I guess means it is not a good idea to rely on - to do stringification.	[reply] [d/l] [select]
Re^4: " - " in the syntax by Anonymous Monk on Mar 06, 2009 at 10:50 UTC
It, A fat comma string-ifies what's on the left of it...that only if it looks like a string.	[reply]
Re^5: " - " in the syntax by cdarke (Prior) on Mar 06, 2009 at 12:04 UTC
See my first example. It appears that what looks like a string to a fat comma is diffferent to what looks like a string to a leading hyphen. `my %a = (keys => 'v1', values => 'v2');` [download] gets stringified correctly, but: `my %a = (-keys , 'v1', -values , 'v2');` [download] does not.	[reply] [d/l] [select]