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XXX: comment ranges method code
[perl/list-index.git]
/
lib
/
List
/
Index.pm
diff --git
a/lib/List/Index.pm
b/lib/List/Index.pm
index e30beef4734174a38f5443895ebad9042325efe8..574613e8b1c38e2e6b3eaf4c751fd42d53c6930e 100644
(file)
--- a/
lib/List/Index.pm
+++ b/
lib/List/Index.pm
@@
-28,12
+28,15
@@
sub ranges {
while ($offset < @$self) {
my $link = substr $self->[$offset], 0, $length;
if ($context) {
while ($offset < @$self) {
my $link = substr $self->[$offset], 0, $length;
if ($context) {
- my $trim = 1;
+ # take a value slightly before the current offset
my $before = $offset > $context ? $self->[$offset - $context] : '.';
my $before = $offset > $context ? $self->[$offset - $context] : '.';
+ # see how much of it matches the current link
+ my $trim = 1;
for my $match (split //, $before) {
scalar $link =~ /\G\Q$match/g or last;
$trim++;
}
for my $match (split //, $before) {
scalar $link =~ /\G\Q$match/g or last;
$trim++;
}
+ # truncate link upto where the earlier value starts to differ
substr($link, $trim) = '' unless $trim > length $link;
}
substr($link, $trim) = '' unless $trim > length $link;
}