package Data::Unixish::rand;
use 5.010;
use strict;
use syntax 'each_on_array'; # to support perl < 5.12
use warnings;
#use Log::Any '$log';
use Data::Unixish::Util qw(%common_args);
our $VERSION = '1.47'; # VERSION
our %SPEC;
$SPEC{rand} = {
v => 1.1,
summary => 'Generate a stream of random numbers',
args => {
%common_args,
min => {
summary => 'Minimum possible value (inclusive)',
schema => ['float*', default=>0],
cmdline_aliases => { a=>{} },
},
max => {
summary => 'Maximum possible value (inclusive)',
schema => ['float*', default=>1],
cmdline_aliases => { b=>{} },
},
int => {
schema => ['bool*', default=>0],
cmdline_aliases => { i=>{} },
},
num => {
summary => 'Number of numbers to generate, -1 means infinite',
schema => ['int*', default=>1],
cmdline_aliases => { n=>{} },
},
},
tags => [qw/datatype:num gen-data/],
"x.dux.is_stream_output" => 1, # for duxapp < 1.41, will be removed later
'x.app.dux.is_stream_output' => 1,
};
sub rand {
my %args = @_;
my ($in, $out) = ($args{in}, $args{out});
# XXX schema
my $min = $args{min} // 0;
my $max = $args{max} // 1;
my $int = $args{int};
my $num = $args{num} // 1;
my $i = 0;
while (1) {
last if $num >= 0 && ++$i > $num;
my $rand = $min + rand()*($max-$min);
$rand = sprintf("%.0f", $rand) if $int;
push @$out, $rand;
}
[200, "OK"];
}
1;
# ABSTRACT: Generate a stream of random numbers
__END__
=pod
=encoding UTF-8
=head1 NAME
Data::Unixish::rand - Generate a stream of random numbers
=head1 VERSION
This document describes version 1.47 of Data::Unixish::rand (from Perl distribution Data-Unixish), released on 2014-06-12.
=head1 SYNOPSIS
In command line:
% dux rand
0.0744685671097649
% dux rand --min 1 --max 10 --num 5 --int
3
4
1
1
5
=head1 FUNCTIONS
=head2 rand(%args) -> [status, msg, result, meta]
Generate a stream of random numbers.
Arguments ('*' denotes required arguments):
=over 4
=item * B<in> => I<any>
Input stream (e.g. array or filehandle).
=item * B<int> => I<bool> (default: 0)
=item * B<max> => I<float> (default: 1)
Maximum possible value (inclusive).
=item * B<min> => I<float> (default: 0)
Minimum possible value (inclusive).
=item * B<num> => I<int> (default: 1)
Number of numbers to generate, -1 means infinite.
=item * B<out> => I<any>
Output stream (e.g. array or filehandle).
=back
Return value:
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.
=head1 SEE ALSO
=head1 HOMEPAGE
Please visit the project's homepage at L<https://metacpan.org/release/Data-Unixish>.
=head1 SOURCE
Source repository is at L<https://github.com/sharyanto/perl-Data-Unixish>.
=head1 BUGS
Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=Data-Unixish>
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.
=head1 AUTHOR
Steven Haryanto <stevenharyanto@gmail.com>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014 by Steven Haryanto.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut