From f467842b8e311a78d9900c4626583fc08a8ce31b Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Fri, 13 Nov 2009 02:24:52 +0100
Subject: [PATCH] XXX: center page distribution

Odd items gravitated to later pages, for example a..z:

	abcdefgh ijklmnopq rstuvwxyz

Change initial offset to create a more uniform distribution:

	abcdefghi jklmnopq rstuvwxyz
---
 lib/List/Index.pm |  2 +-
 t/10-ranges.t     | 11 ++++++-----
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/lib/List/Index.pm b/lib/List/Index.pm
index dca0d1f..483d1eb 100644
--- a/lib/List/Index.pm
+++ b/lib/List/Index.pm
@@ -23,7 +23,7 @@ sub ranges {
 	my $pages    = $options->{pages   } || 1 + int $#$self / $pagesize;
 
 	$pagesize = @$self / $pages;
-	my $offset = $pagesize;
+	my $offset = $pagesize + .5;
 	my @links = ('');
 	while ($offset < @$self) {
 		my $link = substr $self->[$offset], 0, $length;
diff --git a/t/10-ranges.t b/t/10-ranges.t
index aa87a87..a1bb115 100644
--- a/t/10-ranges.t
+++ b/t/10-ranges.t
@@ -14,17 +14,18 @@ my @uniform = 'a'..'z';
 ok(my $index = List::Index->new(\@uniform), 'object (single-char values)');
 is_deeply(\@uniform, ['a'..'z'], 'original data unaltered');
 is_deeply($index->ranges, ['-'], 'single page');
-is_deeply($index->ranges({pages => 3}), [qw(-h i-q r-)], 'given pages');
+is_deeply($index->ranges({pages => 3}), [qw(-i j-q r-)], 'given pages');
 is_deeply($index->ranges({pagesize => @uniform / 2.1}), [qw(
-	-h i-q r-
+	-i j-q r-
 )], 'equivalent pagesize');
 }
 
 {
-ok(my $index = List::Index->new(['aa'..'zz', 1..193]), 'non-alphabetic values (uniform)');
+ok(my $index = List::Index->new(['aa'..'zz', 1..202]), 'non-alphabetic values (uniform)');
 is_deeply($index->ranges, [qw(
-	-. .
-	a-b c-dr ds-fn fo-hk hl-jg jh-k l-m n-o p-qr qs-sn so-uk ul-wg wh-x y-
+	-.
+	.-bp bq-dm dn-fi fj-hf hg-i j-k l-m n-os ot-qp qq-sm sn-uj uk-wf wg-x y-
+
 )], 'default ranges');
 is_deeply($index->ranges({pagesize => 300}), [qw(-c d-o p-)], 'large pagesize');
 }
-- 
2.30.0