in reply to List::MoreUtils before, after and ... between?

If you are sure that both regexes will be found, you can write something like this:

use List::MoreUtils qw/first_index last_index/;
use 5.010;
use strict;
use warnings;
my @a = qw<eval DBIC::3 DBIC::2 DBIC::1 MyApp::3 MyApp::2 MyApp::1 Dan
+cer::3 Dancer::2 Dancer::1>;
my $from = last_index  { /DBIC/ }   @a;
my $to   = first_index { /Dancer/ } @a;
say for @a[$from + 1..$to - 1];

[download]

If one or both regexes might not match, you'd need to special-case undefined $from and $to.

Perl 6 - second systems done right

Replies are listed 'Best First'.
Re^2: List::MoreUtils before, after and ... between?
by Boldra (Curate) on Feb 22, 2012 at 09:13 UTC

    This looks like the most readable to me, thanks Moritz!

    I'm surprised you didn't post a Perl 6 version too ... I love those!



    - Boldra
[reply]

      I just didn't think of coming up with a Perl 6 solution, and even now I don't see a particularly elegant and readable way.

      So I've just ported toolic's solution to Perl 6, making the returned list of found values lazy: 

      my @a = <eval DBIC::3 DBIC::2 DBIC::1 MyApp::3 MyApp::2 MyApp::1 Dance
+r::3 Dancer::2 Dancer::1>;
my @filtered := gather {
    my $flag = 0;
    for @a {
        last if /Dancer/;
        $flag = 1 if /DBIC/;
        $flag = 2 if $flag && !/DBIC/;
        take $_ if $flag == 2;
    }
}
.say for @filtered;

      [download]

      (Tested with current Niecza)

      Perl 6 - second systems done right
[reply]
[d/l]

In Section Seekers of Perl Wisdom