Yoda Speak Translator

[grep]

I was watching the Empire Strikes Back this evening and I wanted to see if I could write a sub to translate a normal sentence into Yoda-speak (read: too much free time). So here it is. I am welcome to suggestions, improvments, or more pivot words.

#!/usr/local/bin/perl -w
use strict;


my @sentences = ('I will teach you',
                 'The truth is out there',
                 'That is an Imperial shuttle',
                 'My husband is giant dork',      #this is my wife's s
+uggestion
                 'These fish are tasty'
                );

foreach (@sentences) {
    print yoda($_)."\n";
}

sub yoda {
    my ($sentence) = @_;

    my @pivot_words = qw/is be will show do try are teach have/;
    
    # Find out if I have a pivot word and grab the one with the lowest
+ index
    my $pivot = (sort { $a->[1] <=> $b->[1]}
                 grep {$_->[1] > 0} 
                 map  { [" $_ ",index($sentence," $_ ")] } @pivot_word
+s)[0];
                        #^^^^^^                 ^^^^^^^
                                                # Change to fix the pr
+oblem [zdog]
                                                # pointed out - THX [z
+dog]

    # No pivot words
    return $sentence if (!$pivot);

    # Pivot the sentence
    $sentence = substr($sentence,$pivot->[1]+length($pivot->[0]),lengt
+h($sentence)).
                " ".
                substr($sentence,0,$pivot->[1]).
                $pivot->[0];
    
    # Clear leading spaces
    $sentence =~ s/^\s+//;

    # Sentence case
    $sentence = ucfirst(lc($sentence));
}

Update: Fixed to handle pivot words inside another word.

Update 2: Fixed the word boundry problem with a better solution. The new sub follows:

sub yoda {
    my ($sentence) = @_;

    my @pivot_words = qw/is be will show do try are teach have/;

    # Find out if I have a pivot word and grab the one with the lowest
+ index
    my $pivot = (sort { $a->[1] <=> $b->[1]}
                 # sort the lowest index to the top

                 grep {$_->[1] > 0}
                 # filter out non-matches
                 
                 map{$sentence =~ /\b$_\b/ ? [$_,$+[0]] : [$_,0]}  @pi
+vot_words)[0];
                 # create an anon array in the format 
                 # ['pivot word',index_of_where_it_is]
                 #
                 # @+ stores the indexes of the successful matches and
+ does not 
                 # require the gyrations that [pos] does 

    # No pivot words
    return $sentence if (!$pivot);

    # Pivot the sentence
    $sentence = substr($sentence,$pivot->[1]).
                " ".
                substr($sentence,0,$pivot->[1]);

    # Clear leading spaces
    $sentence =~ s/^\s+//;

    # Sentence case
    $sentence = ucfirst(lc($sentence));
}

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