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As another option, here's a subroutine to which you send a string and a list of lengths. Matches are returned as an array of arrays (AoA), and the array's empty if nothing's matched:

use strict; use warnings; my $str = 'xxxx yy zzzzz xxxx qqq xxxx vv zzzzz wwww ppp'; my @lengths = qw/2 4 3/; my @seqs = getSequences( $str, @lengths ); print "@$_\n" for @seqs; sub getSequences { my ( $string, @lengths ) = @_; my ( $i, @sequences ) = 0; my $re = join '\b.+?\b', map { $i++; "(?<C$i>[a-z]{$_})" } @length +s; push @sequences, [ map $+{"C$_"}, 1 .. @lengths ] while $string =~ /\b$re\b/ig; return @sequences; }


yy xxxx qqq vv wwww ppp

You mentioned only letters, so [a-z] was used in the regex. However, you may use \\w instead, if that works better for you. Of course, sending the subroutine different lists of lengths produces different results, as the regex is dynamically built.

In reply to Re: match sequences of words based on number of characters by Kenosis
in thread match sequences of words based on number of characters by nicemank

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    [marioroy]: Hello all. After several attempts, am able to move forward and will soon release a Parallel:: ForkManager compatible MCE::Hobo:: Manager, also MCE::Hobo::Simple, and refactored MCE::Hobo engine supporting multiple instances. Wait works beautifully.
    [marioroy]: MCE::Shared has been refined that it allows sharing Tie::File and hash objects containing {fh} key.
    [marioroy]: It's taken so long to take Hobo to a new level. Threads-like and Parallel:: ForkManager management capaiblities.
    [marioroy]: This will complete the 4 years in the making and likely time to move on to something els.
    [marioroy]: s/els/else.

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