Hadoop::Streaming::Reducer::Input::Iterator - Collects values for each key together with an iterator interface
version 0.143060
$Iterator->has_next();
Checks if the iterator has a next_key. Returns 1 if there is another key in the input iterator.
$Iterator->next();
Returns the key and value iterator for the next key. Discards any remaining values from the current key.
Moves the iterator to the next key value, and returns the output of retval( $key, $value);
$Iterator->retval($key ); $Iterator->retval($key, $value);
Returns an two element array containing the key and a Hadoop::Streaming::Reducer::Input::ValuesIterator initialized with the given value as the first element.
( $key, $ValueIterator)
andrew grangaard <spazm@cpan.org>
Naoya Ito <naoya@hatena.ne.jp>
This software is copyright (c) 2014 by Naoya Ito <naoya@hatena.ne.jp>.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
To install Hadoop::Streaming, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Hadoop::Streaming
CPAN shell
perl -MCPAN -e shell install Hadoop::Streaming
For more information on module installation, please visit the detailed CPAN module installation guide.