This might work. It compiles clean but need your data to test it. 

#! perl -slw
use strict;

my (@m_info, @data);

#! Build a hash keyed by the first elements of the info data.
my %m_info = map{ $_->[0] => $_ } @m_info;

#! Build a (this|that|the other) regex from the search keys (Method by
+ [theDamian]).
#! Updated to correct *my* errors when adapting [the Damian]'s code as
+ spotted by [Aristotle]++ below.
my $regex =  qr/(@{ [ join '|', map { "\Q$_\E" }  keys %m_info ] })/;

for my $record (@data) {
    if ( $record =~ $regex ) {
        #! $1 contains the key that matched.
        #! The corresponding array can be looked up from the hash
        my $info = $m_info{$1};

        #! do the rest of your stuff
        #!$info->[3]...
    }
}

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Examine what is said, not who speaks.

In reply to Re: More efficient Data Structure needed by BrowserUk
in thread More efficient Data Structure needed by Anonymous Monk

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