Sure, here you go:

use strict; use warnings;
use Algorithm::Diff qw/ LCS_length /;

( my $name = $ARGV[0] ) && length $ARGV[0] > 2 or die "Usage: `$0 <nam
+e>` (min. 3 letters)";

open my $fh, '<', '/usr/share/dict/words' or die $!;

my $found = 0;
while ( <$fh> ) {
    next unless LCS_length( [ split //, $name ], [ split // ] ) == len
+gth $name;
    $found++;
    print "$found $_";
}

__END__
[download]

Things to maybe note:

• How to load a clever module and import its LCS_length function to do all the work :-)
• How to capture the user input from the command line in the array @ARGV
• How to open a file for reading
• How to create a counter and increment it in a loop
• How to read from an open filehandle line-by-line (which avoids reading it all into memory), using:

  while ( <$fh> ) {
      ...
  }
  [download]

• The most obfuscated thing in this script: How to be lazy and not have to tell a function what to operate on by using the default argument, which is the current value of the magic variable $_. So in a loop I can say:

  while ( <$fh> ) { # each line is loaded into $_ in turn
      my @characters = split //;
  }
  [download]

  , omitting the second argument to split, and Perl knows to Do The Right Thing. More self-documenting usage would be:

  while ( my $line = <$fh> ) { # each line now in $line
      my @characters = split //, $line;
  }
  [download]

Note that you can get documentation on many of Perl's built-in functions with perldoc -f <function_name>, e.g. perldoc -f split.

Hope this helps! have fun ....

edit: fixed missing parens

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