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Answer: How do I Loop over multiple arrays simultaneously?

by gaurav.trikha (Initiate)
on Aug 07, 2012 at 14:02 UTC ( #985996=categorized answer: print w/replies, xml ) Need Help??

Q&A > arrays > How do I Loop over multiple arrays simultaneously ? - Answer contributed by gaurav.trikha

Well, assuming that it's certain that the arrays are all the same length, just translate the statement of the problem into Perl: have an index going the length of one of them, and then use it in all of them:

my @a = qw( a b c ); my @b = qw( A B C ); my @c = qw( 1 2 3 ); for my $i ( 0 .. $#a ) { print $a[$i], $b[$i], $c[$i]; }

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[Discipulus]: yes marto I understood
[Corion]: Discipulus: I'm slowly migrating my code to require 5.8.x ;) Most of my code works on 5.6, but Filter::signatures requires 5.10 I think
[Corion]: 5.14 is also a good target, widely available and fairly stable. Also, over five years old, which doesn't push people into a needless upgrade cycle
[Discipulus]: yes I saw your efforts Corion but the pain is worth?
[Corion]: Discipulus: IMO it's not that much pain, but most of the systems I use have a Perl 5.14 or newer on them nowadays
[marto]: the question is more, is Padre still the way new users should be directed?
[Discipulus]: ah ah I have all 5.26 atm but I play alone..
[Corion]: Except this RHEL box, which comes with Perl 5.10.1 , but there I installed my own 5.20.3 for the real Perl programs we run ;)
[Corion]: marto: I used Padre for some time but then switched to Notepad++, since all the funky features I wanted to put into Padre couldn't be made to work, and/or I lost interest :)
[Discipulus]: indeed marto I dunno. I tested once and many years ago. But I'm not the programmer yardstick. I try to install Padre via cpan now just to add a line about it in the issue. Strawberryperl all life long!

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