I think you did a nice job on your script(!), and you've received great comments about it. I'm not too sure if the following addresses either efficiency or elegance, but it's another option:

use Modern::Perl;

my @array = ( 0, 11, 23, 40, 52, 67 );
my $find = 27;

my ( $before, $after ) = findValAlongArray( $find, @array );

if ( defined $before and $before == $after ) {
    say "Exact match $find.";
}
elsif ( defined $before ) {
    say "$find is between $before and $after.";
}
else {
    say "$find was not found along the array.";
}

sub findValAlongArray {
    my ( $find, @array ) = @_;
    return $find, $find if $find ~~ @array;

    @array = sort { $a <=> $b } @array;

    for ( my $i = 0 ; $i < $#array ; $i++ ) {
        return $array[$i], $array[ $i + 1 ]
          if $array[$i] < $find and $array[ $i + 1 ] > $find;
    }

    undef, undef;
}

[download]

Output:

27 is between 23 and 40.

[download]

Hope this helps!

Update: Added exact matching using smart match.

In reply to Re: Improve my lookup script by Kenosis
in thread Improve my lookup script by jjap

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