Perl5 ch2 solution

Updated p6 solution.

Code needs much improvement!

3 files changed, 370217 insertions, 49 deletions

diff --git a/challenge-007/ruben-westerberg/perl5/ch-2.pl b/challenge-007/ruben-westerberg/perl5/ch-2.pl
new file mode 100755
index 0000000000..add3a37e3b
--- /dev/null
+++ b/challenge-007/ruben-westerberg/perl5/ch-2.pl
@@ -0,0 +1,81 @@
+#!/usr/bin/env perl
+#
+
+use warnings;
+use strict;
+use FindBin;
+
+my @start=split '', $ARGV[0];
+my @end=split '', $ARGV[1];
+my $wordPath= $ARGV[2];
+
+die "Not enough arguments" if (@ARGV !=3);
+die "Words not the same length: Ladder: ()\n" if (@start != @end);
+#my $wordsFile= $FindBin::Bin."/../words_alpha.txt";
+open my $wfh, "<" , $wordPath;
+my @words;
+my $ok=0;
+my $start=$ARGV[0];
+my $end=$ARGV[1];
+while (<$wfh>) {
+        chomp;
+	$ok++ if $_ eq $start;
+	$ok++ if $_ eq $end;;
+        my @a=(split '', lc $_);
+        push @words, \@a if @a == @start;
+}
+close $wfh;
+die "Words not in dictionary: Ladder: ()\n" if ($ok!=2);
+
+my @transforms;
+push @transforms, {w=>\@start, p=>undef};
+my @seen;
+push @seen, \@start;
+my $result;
+my $i=0;
+
+while (@transforms != 0) {
+	my $e=shift @transforms;
+	my $c=$$e{w};
+	print "Iteration: $i, Queue length: ".scalar @transforms." Current word: @$c\n";
+	#print "@$c";
+	$result=$e;
+	last if (join ('', @$c) eq join ('', @end));
+	map { 
+		my $d=$_;
+		my $sum=0;
+		for (my $i=0; $i<@$c ;$i++) {
+			$sum++ if @$d[$i] eq @$c[$i];
+		}
+		my $part1= $sum == (@$c-1);	
+		my $part2=grep({ join '', $_ eq join '', @$d} @seen) == 0;
+		if ($part1 && $part2) {
+			#print @$d;
+			push @seen, $d;
+			push @transforms, {w=>$d, p=>$e};
+		}
+
+	} @words;
+	$i++;
+}
+if ($result) {
+	print "Ladder: (".join(" ", reverse pathFromParent($result, \@start)).")";
+
+}
+else {
+	print "No ladder found: Ladder: ()";
+}
+
+sub pathFromParent {
+	my $parent= shift;
+	my $word= shift;
+	my @path;
+	#print @{$$result{w}};;
+	while ($parent) {
+		push @path, join ('', @{$$parent{w}});
+		#print @path;
+		last if (join ('', @{$$parent{w}}) eq join('', @$word));
+		$parent=$$parent{p};
+	}
+	return @path;
+}
diff --git a/challenge-007/ruben-westerberg/perl6/ch-2.p6 b/challenge-007/ruben-westerberg/perl6/ch-2.p6
index d9ce480edc..95a0ba3477 100755
--- a/challenge-007/ruben-westerberg/perl6/ch-2.p6
+++ b/challenge-007/ruben-westerberg/perl6/ch-2.p6
@@ -4,68 +4,56 @@
 #read arguments, first is start word second is end word
 die "Need three arguments, start and end words" if @*ARGS.elems != 3;
 my ($start,$end, $wordFileName)=@*ARGS[0..2];
+$start.=lc;
+$end.=lc;
+die "Words not the same length: Ladder ()"  unless ($start.chars == $end.chars);
 
-my @words=$wordFileName.IO.lines.grep({.chars == $start.chars});
-unless $start.chars == $end.chars && @words.grep( { $_ eq all ($start, $end)} ) {
-	say ((););
-}
+my @words=($wordFileName.IO.lines.grep({.chars == $start.chars})>>.&{.lc.comb.cache});
+
+die  "Start not in dictionary: Ladder ()" unless (grep $start, @words>>.join);
+die "End not in dictionary: Ladder ()" unless (grep $end, @words>>.join);
 
-say "Testing against @words.elems()";
-my @seen;
-my $s={word=>$start,parent=>Any};
-#my $node=transforms($start,$s);
+my @start=$start.comb;
+my @end=$end.comb;
 my @transforms;
 my $found=False;
 my $result;
-@transforms.push: $s;
-while @transforms > 0 && !$found {
-	say "To Test: "~ @transforms.elems~ " Dict: " ~ @words.elems;
-	my $current:= @transforms.shift;
-	my @toAdd=transforms($current);
-	@transforms.append: @toAdd;
-}
-say pathFromParent($result, $start);
-	
-
-#read word list from file and filter by word length
-sub transforms($parent is rw) {
-	constant @letters="a".."z";
-	my $word=$parent<word>;
-	#@seen.push($word);
-	$found = $word eq $end;
-	$result=$parent; #if ($word eq $end) && (! so $result);
-
-	return if $found;
+@transforms.push: {w=>@start , p=>Any};
+my @seen.push: @start;
 
-	my @c=$word.comb;
 
-	#say $word;
-	my $w;
-	my @transforms=gather {
-		for ^@c -> $c {
-			for  @letters -> $l {
-				my @tmp=@c;
-				@tmp[$c]=$l; 
-				$w:=@tmp.join;
-				if ( (@words.grep($w) > 0)  && (@transforms.grep($w) == 0)) {
-					#say $w;
-					
-					@words=@words.grep({ $_ ne $w});
-					take {word=>$w, parent=>$parent};
-				}
-			}
+my @c=@start;
+my $i=0;
+while @transforms !== 0 {
+	my $e=@transforms.shift;
+	my $c=$e<w>;
+	say "Itertion: $i, Queue Length: "~ @transforms.elems~ " Current word: $c";
+	#exit if $c ~~ <h e r m> && @transforms !==0;
+	$result=$e;
+	last if $c ~~ @end;
+	
+	@words.map(-> $d {
+		if (($d >>eq<< $c).sum == ($c-1)) && (@seen.grep($d) == 0) {
+			@seen.push: $d;
+			@transforms.push: (w=>$d, p=>$e).Hash;
 		}
-	}
-	@transforms;
+	});
+	$i++;
 }
-	
+if $result {
+	say "Ladder: ("~pathFromParent($result,$start)~")";
+}
+else {
+	say "No ladder found: Ladder: ()";
+}
+
 sub pathFromParent($node, $word) {
 	my @path;
 	my $parent=$node;
 	while ($parent) {
-		@path.push: $parent<word>;
-		last if $parent<word> eq $word;
-		$parent=$parent<parent>;
+		@path.push: $parent<w>.join;
+		last if $parent<w>.join eq $word.join;
+		$parent=$parent<p>;
 	}
 	@path.reverse;
 }
diff --git a/challenge-007/ruben-westerberg/words_alpha.txt b/challenge-007/ruben-westerberg/words_alpha.txt
new file mode 100644
index 0000000000..8902fa2503
--- /dev/null
+++ b/challenge-007/ruben-westerberg/words_alpha.txt
@@ -0,0 +1,370099 @@
+a
+aa
+aaa
+aah
+aahed
+aahing
+aahs
+aal
+aalii
+aaliis
+aals
+aam
+aani
+aardvark
+aardvarks
+aardwolf
+aardwolves
+aargh
+aaron
+aaronic
+aaronical
+aaronite
+aaronitic
+aarrgh
+aarrghh
+aaru
+aas
+aasvogel
+aasvogels
+ab
+aba
+ababdeh
+ababua
+abac
+abaca
+abacay
+abacas
+abacate
+abacaxi
+abaci
+abacinate
+abacination
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+abaciscus
+abacist
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+abamperes
+abamps
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