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# NAME

Acme::Glue - A placeholder module for code accompanying a Perl photo project

# VERSION

2025.11

# DESCRIPTION

Acme::Glue is the companion Perl module for a Perl photo project, the idea
for the photo project is to have each photo include a small snippet of code.
The code does not have to be Perl, it just has to be something you're quite
fond of for whatever reason.

"Glue" is a series of photos shot at Perl conferences and workshops in Europe
and America. Perl was one of the programming languages that bootstrapped a
lot of internet based companies in the mid/late 1990s and early 2000s. Perl
was considered a “glue” language by some, but has fallen out of favour as
newer languages have taken its place. The title is a metaphor not just for
the language but also for shrinking of the community at the events the photos
are shot at.

# SNIPPETS

Here are the snippets that may accompany the photo project

## LEEJO (transform.pl)

    #!/usr/bin/env perl
    #
    # transform an array of hashes into an array of arrays where each array
    # contains the values from the hash sorted by the original hash keys or
    # the passed order of columns (hash slicing)
    my @ordered = $column_order
        ? map { [ @$_{ @{ $column_order } } ] } @{ $chaos }
        : map { [ @$_{sort keys %$_} ] } @{ $chaos };

## LEEJO (hopscotch.p6)

    #!/usr/bin/env perl6

    my @court = (
        [ 'FIN' ],
        [ 9 ,10 ],
        [   8   ],
        [ 6 , 7 ],
        [   5   ],
        [   4   ],
        [ 2 , 3 ],
        [   1   ],
    );

    my $skip = @court.[1..*].pick.pick;
    my @play;

    for @court.reverse -> $hop {
        @play.push( $hop.map( *.subst( /^$skip$/,'🚫' ).list ) );
    }

    say @play.reverse.join( "\n" );

## LEEJO (vec and pack examples from perldoc vec)

    #!/usr/bin/env perl -wl

    print <<'EOT';
                                      0         1         2         3
                       unpack("V",$_) 01234567890123456789012345678901
    ------------------------------------------------------------------
    EOT

    for $w (0..3) {
        $width = 2**$w;
        for ($shift=0; $shift < $width; ++$shift) {
            for ($off=0; $off < 32/$width; ++$off) {
                $str = pack("B*", "0"x32);
                $bits = (1<<$shift);
                vec($str, $off, $width) = $bits;
                $res = unpack("b*",$str);
                $val = unpack("V", $str);
                write;
            }
        }
    }

    format STDOUT =
    vec($_,@#,@#) = @<< == @######### @>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
    $off, $width, $bits, $val, $res
    .
    __END__

## LEEJO (example from "How Perl Saved the Human Genome Project" complete with syntax error)