NAME

Perinci::Examples::Stream - Examples for streaming input/output

VERSION

This document describes version 0.80 of Perinci::Examples::Stream (from Perl distribution Perinci-Examples), released on 2017-07-11.

DESCRIPTION

This package contains functions that demonstrate streaming input/output.

FUNCTIONS

count_ints

Usage:

 count_ints(%args) -> [status, msg, result, meta]

This function accepts a stream of integers and return the number of integers input.

This function is not exported.

Arguments ('*' denotes required arguments):

  • input => array[int]

    Numbers.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

count_lines

Usage:

 count_lines(%args) -> [status, msg, result, meta]

Count number of lines in the input.

This function is not exported.

Arguments ('*' denotes required arguments):

  • input => array[str]

    Lines.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

count_words

Usage:

 count_words(%args) -> [status, msg, result, meta]

This function receives a stream of words and return the number of words.

Input validation will check that each record from the stream is a word.

This function is not exported.

Arguments ('*' denotes required arguments):

  • input => array[str]

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

produce_hashes

Usage:

 produce_hashes(%args) -> [status, msg, result, meta]

This function produces a stream of hashes.

This function is not exported.

Arguments ('*' denotes required arguments):

  • num => int

    Limit number of entries to produce.

    The default is to produce an infinite number.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (array[hash])

produce_ints

Usage:

 produce_ints(%args) -> [status, msg, result, meta]

This function produces a stream of integers, starting from 1.

This function is not exported.

Arguments ('*' denotes required arguments):

  • num => int

    Limit number of entries to produce.

    The default is to produce an infinite number.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (array[int])

produce_words

Usage:

 produce_words(%args) -> [status, msg, result, meta]

This function produces a stream of random words.

This function is not exported.

Arguments ('*' denotes required arguments):

  • num => int

    Limit number of entries to produce.

    The default is to produce an infinite number.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (array[str])

produce_words_err

Usage:

 produce_words_err(%args) -> [status, msg, result, meta]

Like `produce_words()`, but 1 in every 10 words will be a non-word (which fails the result schema).

This function is not exported.

Arguments ('*' denotes required arguments):

  • num => int

    Limit number of entries to produce.

    The default is to produce an infinite number.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (array[str])

square_nums

Usage:

 square_nums(%args) -> [status, msg, result, meta]

This function squares its stream input.

This function is not exported.

Arguments ('*' denotes required arguments):

  • input* => array[float]

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (array[float])

square_nums_from_file

Usage:

 square_nums_from_file(%args) -> [status, msg, result, meta]

This function squares its stream input.

This function is not exported.

Arguments ('*' denotes required arguments):

  • input* => array[float]

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (array[float])

square_nums_from_stdin

Usage:

 square_nums_from_stdin(%args) -> [status, msg, result, meta]

This function squares its stream input.

This function is not exported.

Arguments ('*' denotes required arguments):

  • input* => array[float]

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (array[float])

square_nums_from_stdin_or_file

Usage:

 square_nums_from_stdin_or_file(%args) -> [status, msg, result, meta]

This function squares its stream input.

This function is not exported.

Arguments ('*' denotes required arguments):

  • input* => float

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (array[float])

wc

Usage:

 wc(%args) -> [status, msg, result, meta]

Count the number of lines/words/characters of input, like the "wc" command.

This function is not exported.

Arguments ('*' denotes required arguments):

  • input* => array[str]

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (hash)

wc_keys

Usage:

 wc_keys(%args) -> [status, msg, result, meta]

Count the number of keys of each hash.

This is a simple demonstration of accepting a stream of hashes. In command-line application this will translate to JSON stream.

This function is not exported.

Arguments ('*' denotes required arguments):

  • input* => array[hash]

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (hash)

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Perinci-Examples.

SOURCE

Source repository is at https://github.com/perlancar/perl-Perinci-Examples.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Perinci-Examples

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2017, 2016, 2015, 2014, 2013, 2012, 2011 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.