$pagesize = @$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 //, $before) {
substr($link, $trim) = '' unless $trim > length $link;
}
+ $penalty = 0;
if ($offset + $context < $#$self) {
# take a value after the current offset
my $after = $self->[$offset + $context];
# use this link if it's shorter
if ($trim < length $link) {
$link = substr $after, 0, $trim;
+ for ($offset .. $#$self) {
+ last if $self->[$offset + $penalty] =~ /^\Q$link/;
+ $penalty++;
+ }
}
}
}
=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