Yaml !perl/range to perl range

mpegjohn has asked for the wisdom of the Perl Monks concerning the following question:

I have read in a yaml file where we specified a perl range like my_range: !perl/range 0..4 We use Yaml::XS to read in the yaml. and we get $my_range which is a reference to a perl/range which is a reference to a scalar with a value '0..4'. I have de-referenced this and tried to use this to setup an array: @array={$$value), but all I get is an array with one element of value '0..4'. How do I setup an array with this? Thanks.

Comment on Yaml !perl/range to perl range Download Code

Replies are listed 'Best First'.
Re: Yaml !perl/range to perl range by choroba (Cardinal) on Dec 01, 2012 at 20:53 UTC
Use split to get the margins: `use strict; use warnings; use feature 'say'; my $s = "2..5"; my ($start, $end) = split /\.\./, $s; say for $start .. $end;` [download] لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply] [d/l]
Re^2: Yaml !perl/range to perl range by mpegjohn (Novice) on Dec 01, 2012 at 21:07 UTC
Yes, that looks good. Just thought I could have used the scalar and setup an array using that scalar. I like the split idea though.	[reply]
Re: Yaml !perl/range to perl range by BrowserUk (Patriarch) on Dec 01, 2012 at 22:53 UTC
As this is coming from a known format, you could safely do: `@array = eval $$value;` `$s = '1..4'; $r = \$s; @a = eval $$r; print @a;; 1 2 3 4` [download] With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday' Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice. RIP Neil Armstrong	[reply] [d/l] [select]


Perl Monk, Perl Meditation
	PerlMonks