X-Git-Url: http://git.shiar.net/perl/list-index.git/blobdiff_plain/f467842b8e311a78d9900c4626583fc08a8ce31b..1c331324738bb8ca05889f1a7baa5e1b40595d38:/lib/List/Index.pm

diff --git a/lib/List/Index.pm b/lib/List/Index.pm
index 483d1eb..4a21189 100644
--- a/lib/List/Index.pm
+++ b/lib/List/Index.pm
@@ -28,9 +28,9 @@ sub ranges {
 	while ($offset < @$self) {
 		my $link = substr $self->[$offset], 0, $length;
 		if ($context) {
-			{
+			if ($offset > $context - 1) {
 				# take a value slightly before the current offset
-				my $before = $offset > $context ? $self->[$offset - $context] : '.';
+				my $before = $self->[$offset - $context - 1];
 				# see how much of it matches the current link
 				my $trim = 1;
 				for my $match (split //, $before) {
@@ -164,18 +164,18 @@ __END__
 
 =head1 NAME
 
-List::Index - Paginate alphabetic entries by finding minimal prefixes
+List::Index - Find and apply prefix ranges to paginate keywords
 
 =head1 SYNOPSIS
 
 	use List::Index;
 	my $index = List::Index->new(\@values);
 	my @pages = $index->ranges({pagesize => 50});
-	printf '<a href="?q=%s-%s">%1$s</a> ', @$_ for @pages;
+	say "<a href='?q=$_'>$_</a>" for @pages;
 
 	use List::Index 'rangematch';
-	my $limit = rangematch('b-bmq');  # matches prefix like 'baa'..'bmq'
-	@results = grep { $limit } @results;
+	my $limit = rangematch('b-bmq');  # ge 'b' && le 'bmq'
+	@request = grep { $limit } @values;
 
 =head1 DESCRIPTION