NAME
Perinci::Examples::Stream - Examples for streaming input/output
VERSION
This document describes version 0.824 of Perinci::Examples::Stream (from Perl distribution Perinci-Examples), released on 2023-07-09.
DESCRIPTION
This package contains functions that demonstrate streaming input/output.
FUNCTIONS
count_ints
Usage:
count_ints(%args) -> [$status_code, $reason, $payload, \%result_meta]This function accepts a stream of integers and return the number of integers input.
This function is not exported.
Arguments ('*' denotes required arguments):
input => array[int]
Numbers.
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (any)
count_lines
Usage:
count_lines(%args) -> [$status_code, $reason, $payload, \%result_meta]Count number of lines in the input.
This function is not exported.
Arguments ('*' denotes required arguments):
input => array[str]
Lines.
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (any)
count_words
Usage:
count_words(%args) -> [$status_code, $reason, $payload, \%result_meta]This function receives a stream of words and return the number of words.
Input validation will check that each record from the stream is a word.
This function is not exported.
Arguments ('*' denotes required arguments):
input => array[str]
(No description)
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (any)
produce_hashes
Usage:
produce_hashes(%args) -> [$status_code, $reason, $payload, \%result_meta]This function produces a stream of hashes.
This function is not exported.
Arguments ('*' denotes required arguments):
num => int
Limit number of entries to produce.
The default is to produce an infinite number.
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (array[hash])
produce_ints
Usage:
produce_ints(%args) -> [$status_code, $reason, $payload, \%result_meta]This function produces a stream of integers, starting from 1.
This function is not exported.
Arguments ('*' denotes required arguments):
num => int
Limit number of entries to produce.
The default is to produce an infinite number.
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (array[int])
produce_words
Usage:
produce_words(%args) -> [$status_code, $reason, $payload, \%result_meta]This function produces a stream of random words.
This function is not exported.
Arguments ('*' denotes required arguments):
num => int
Limit number of entries to produce.
The default is to produce an infinite number.
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (array[str])
produce_words_err
Usage:
produce_words_err(%args) -> [$status_code, $reason, $payload, \%result_meta]Like `produce_words()`, but 1 in every 10 words will be a non-word (which fails the result schema).
This function is not exported.
Arguments ('*' denotes required arguments):
num => int
Limit number of entries to produce.
The default is to produce an infinite number.
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (array[str])
square_nums
Usage:
square_nums(%args) -> [$status_code, $reason, $payload, \%result_meta]This function squares its stream input.
This function is not exported.
Arguments ('*' denotes required arguments):
input* => array[float]
(No description)
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (array[float])
square_nums_from_file
Usage:
square_nums_from_file(%args) -> [$status_code, $reason, $payload, \%result_meta]This function squares its stream input.
This function is not exported.
Arguments ('*' denotes required arguments):
input* => array[float]
(No description)
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (array[float])
square_nums_from_stdin
Usage:
square_nums_from_stdin(%args) -> [$status_code, $reason, $payload, \%result_meta]This function squares its stream input.
This function is not exported.
Arguments ('*' denotes required arguments):
input* => array[float]
(No description)
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (array[float])
square_nums_from_stdin_or_file
Usage:
square_nums_from_stdin_or_file(%args) -> [$status_code, $reason, $payload, \%result_meta]This function squares its stream input.
This function is not exported.
Arguments ('*' denotes required arguments):
input* => float
(No description)
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (array[float])
wc
Usage:
wc(%args) -> [$status_code, $reason, $payload, \%result_meta]Count the number of lines/words/characters of input, like the "wc" command.
This function is not exported.
Arguments ('*' denotes required arguments):
input* => array[str]
(No description)
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (hash)
wc_keys
Usage:
wc_keys(%args) -> [$status_code, $reason, $payload, \%result_meta]Count the number of keys of each hash.
This is a simple demonstration of accepting a stream of hashes. In command-line application this will translate to JSON stream.
This function is not exported.
Arguments ('*' denotes required arguments):
input* => array[hash]
(No description)
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
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.
AUTHOR
perlancar <perlancar@cpan.org>
CONTRIBUTING
To contribute, you can send patches by email/via RT, or send pull requests on GitHub.
Most of the time, you don't need to build the distribution yourself. You can simply modify the code, then test via:
% prove -lIf you want to build the distribution (e.g. to try to install it locally on your system), you can install Dist::Zilla, Dist::Zilla::PluginBundle::Author::PERLANCAR, Pod::Weaver::PluginBundle::Author::PERLANCAR, and sometimes one or two other Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps required beyond that are considered a bug and can be reported to me.
COPYRIGHT AND LICENSE
This software is copyright (c) 2023, 2022, 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011 by perlancar <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.
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.