I have the following:
$data{host} -> [$i] -> {someotherstuff}
How can I get the length of the array where [$i] is?
Thanks!
views:
72answers:
3and they say Perl syntax is convoluted (says the guy who's been using Perl since v2.x)
msw
2010-05-20 16:37:07
I always just tell people that Perl is ahead of it's time :-)
Cfreak
2010-05-20 16:37:57
No need for `scalar`. `$length = @{ $data{host} }` would've worked just as well.
Zaid
2010-05-20 16:45:32
That did the trick! Thanks!
Magicked
2010-05-20 16:45:43
@Zaid: true but I like using scalar because I think it's clearer. I'm a crazy perl programmer who worries about maintainability :-D
Cfreak
2010-05-20 16:50:10
If assignment to a scalar variable doesn't imply scalar context strongly enough, I'm not sure who you're expecting to be maintaining your Perl code.
John Siracusa
2010-05-20 17:10:36
A:
Answer added on account of msw's comment:
use autobox::Core;
# ...
$data{host}->length;
This works the same as Cfreak's answer, except with much less convoluted syntax, at the cost of using a module.
I have the thesis that most legitimate complaints about Perl can be simply answered with »It does not need to be this way!« and satisfied with short synopsis from CPAN.
daxim
2010-05-21 09:21:24
A:
If you want the last index, you can use: $#@{ $data{host} }
Obviously, the length of the array is last index + 1. Use this notation when it is harder to achieve scalar context, or when you specifically want length-1. For example:
0..$#{$data{host}} # returns a list of all indices of the array
Sometime useful.
Uri
2010-05-21 13:39:19