1Iterator(3)           User Contributed Perl Documentation          Iterator(3)
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NAME

6       Class::Iterator - Iterator class
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SYNOPSIS

9         use Class::Iterator;
10         my $it = Class::Iterator->new(\&closure_generator);
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12         while (my $v = $it->next) { print "value : $v\n" }
13
14         # use map like
15         my $it2 = imap { ...some code with $_...} $it
16         while (my $v = $it->next) { print "value : $v\n" }
17
18         # use grep like
19         my $it3 = igrep { ...some code with $_...} $it
20         while (my $v = $it->next) { print "value : $v\n" }
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DESCRIPTION

23       Class::Iterator is a generic iterator object class. It use a closure an
24       wrap into an object interface.
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26       new(\&closure_generator)
27           This is the constructor. The argument is a sub which look like
28             sub closure_generator {
29               my $private_data;
30               return sub {
31                 # do something with $private_data
32                 # and return it
33                 return $private_data
34               } }
35
36       next
37           calling this method make one iteration.
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39       $o = imap { ... } $it
40           This a creator. It create a new iterator from an existant iterator
41           in the manner of map.
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43       $o = igrep { ... } $it
44           This a creator. It create a new iterator from an existant iterator
45           in the manner of grep.
46

CREDITS

48       Marc Jason Dominius's YAPC::EU 2003 classes.  Ken Olstad
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AUTHOR

51       Robert Silve <robert@silve.net>
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55perl v5.38.0                      2023-07-20                       Iterator(3)