X-Git-Url: http://git.shiar.net/gitweb.cgi/perl/list-index.git/blobdiff_plain/f467842b8e311a78d9900c4626583fc08a8ce31b..3e2d0470d99683367de89a9ad4569247d3897355:/lib/List/Index.pm?ds=sidebyside
diff --git a/lib/List/Index.pm b/lib/List/Index.pm
index 483d1eb..06c2727 100644
--- a/lib/List/Index.pm
+++ b/lib/List/Index.pm
@@ -24,13 +24,14 @@ sub ranges {
$pagesize = @$self / $pages;
my $offset = $pagesize + .5;
+ my $penalty = 0;
my @links = ('');
while ($offset < @$self) {
my $link = substr $self->[$offset], 0, $length;
if ($context) {
- {
+ if ($offset > $context - 1 + $penalty) {
# take a value slightly before the current offset
- my $before = $offset > $context ? $self->[$offset - $context] : '.';
+ my $before = $self->[$offset - $context - 1 + $penalty];
# see how much of it matches the current link
my $trim = 1;
for my $match (split //, $before) {
@@ -41,6 +42,7 @@ sub ranges {
substr($link, $trim) = '' unless $trim > length $link;
}
+ $penalty = 0;
if ($offset + $context < $#$self) {
# take a value after the current offset
my $after = $self->[$offset + $context];
@@ -53,6 +55,9 @@ sub ranges {
# use this link if it's shorter
if ($trim < length $link) {
$link = substr $after, 0, $trim;
+# $offset += $context + 1;
+ $self->[$offset + ++$penalty] =~ /^\Q$link/
+ while $offset + $penalty < $#$self;
}
}
}
@@ -164,18 +169,18 @@ __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 = $index->ranges({pagesize => 50});
- printf '%1$s ', @$_ for @pages;
+ say "$_" 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