/ 
Iterator-Flex-0.18
River stage zero No dependents
/ Iterator::Flex::Manual::PriorArt

NAME

Iterator::Flex::Manual::PriorArt - Other Iterator Models

VERSION

version 0.18

DESCRIPTION

Iterators are not new.

Other Languages

These languages provide official iterator facilities, namely classes whose objects retrieve data from a source (similar to this package). There's a range in how they signal exhaustion:

  • Python, throws an exception StopIteration;

  • Raku returns a special sentinel value IterationEnd;

  • JavaScript returns an object with value and done properties, with done false;

  • Ruby (via the Enumerator class) raises the StopIteration exception;

  • Java throws a NoSuchElementException exception.

C++

C++ arguably has the most complicated model of iterators, as they can insert as well as retrieve. They're also a very different model from other languages, so not comparable.

Perl

And Perl... Well, Perl doesn't provide an official iterator, so Perl can signal exhaustion any way it wants. This is great unless you need to use an iterator which doesn't fit your exhaustion model. In any case, see Iterator::Flex::Manual::Alien.

INTERNALS

SUPPORT

Bugs

Please report any bugs or feature requests to bug-iterator-flex@rt.cpan.org or through the web interface at: https://rt.cpan.org/Public/Dist/Display.html?Name=Iterator-Flex

Source

Source is available at

https://gitlab.com/djerius/iterator-flex

and may be cloned from

https://gitlab.com/djerius/iterator-flex.git

SEE ALSO

Please see those modules/websites for more information related to this module.

AUTHOR

Diab Jerius <djerius@cpan.org>

COPYRIGHT AND LICENSE

This software is Copyright (c) 2018 by Smithsonian Astrophysical Observatory.

This is free software, licensed under:

The GNU General Public License, Version 3, June 2007