Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

Re^2: Printing from three arrays

by daxim (Curate)
on Sep 26, 2019 at 10:37 UTC ( [id://11106739]=note: print w/replies, xml ) Need Help??


in reply to Re: Printing from three arrays
in thread Printing from three arrays

Nested loops become unwieldy when you have many arrays. With a suitable module it does not matter how many dimension the input has: 
use 5.010;
use Set::Scalar qw();
my $iter = Set::Scalar->cartesian_product_iterator(
    map { Set::Scalar->new(@$_) }
        [1, 2, 3],
        [qw/a b c/],
        [qw/I II III/],
);
while (my @m = $iter->()) {
    say "@m";
}

[download]
There are numerous alternatives: https://metacpan.org/search?q=cartesian+product
Bonus: 
use v6;
.say for cross (1, 2, 3), <a b c>, <I II III>

[download]

In Section Seekers of Perl Wisdom

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?

www.com | www.net | www.org
Node Status?
node history
Node Type: note [id://11106739]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? • Last hour • Other CB clients
Other Users?
Others examining the Monastery: (2)
As of 2024-04-20 05:15 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found