NAME
    Data::Unixish - Implementation for Unixish, a data transformation
    framework

VERSION
    version 1.42

SYNOPSIS
     # the a/f/l/c prefix determines whether function accepts
     # arrayref/file(handle)/list/callback as input. the a/f/l/c suffix determines
     # whether function returns an array, a list, a filehandle, or calls a callback.
     # If filehandle is chosen as output, a child process is forked to process input
     # as requested.

     use Data::Unixish qw(
                           aduxa cduxa fduxa lduxa
                           aduxc cduxc fduxc lduxc
                           aduxf cduxf fduxf lduxf
                           aduxl cduxl fduxl lduxl
     ); # or you can use :all to export all functions

     # apply function, without argument
     my @out = lduxl('sort', 7, 2, 4, 1);  # => (1, 2, 4, 7)
     my $out = lduxa('uc', "a", "b", "c"); # => ["A", "B", "C"]
     my $res = fduxl('wc', "file.txt");    # => "12\n234\n2093" # like wc's output

     # apply function, with some arguments
     my $fh = fduxf([trunc => {width=>80, ansi=>1, mb=>1}], \*STDIN);
     say while <$fh>;

DESCRIPTION
    This distribution implements Unixish, a data transformation framework
    inspired by Unix toolbox philosophy.

FUNCTIONS
    The functions are not exported by default. They can be exported
    individually or altogether using export tag ":all".

  aduxa($func, \@input) => ARRAYREF
  aduxc($func, $callback, \@input)
  aduxf($func, \@input) => FILEHANDLE
  aduxl($func, \@input) => LIST (OR SCALAR)
    The "adux*" functions accept an arrayref as input. $func is a string
    containing dux function name (if no arguments to the dux function is to
    be supplied), or "[$func, \%args]" to supply arguments to the dux
    function. Dux function name corresponds to module names
    "Data::Unixish::NAME" without the prefix.

    The *duxc functions will call the callback repeatedly with every output
    item.

    The *duxf functions returns filehandle immediately. A child process is
    forked, and dux function is run in the child process. You read output as
    lines from the returned filehandle.

    The *duxl functions returns result as list. It can be evaluated in
    scalar to return only the first element of the list. However, the whole
    list will be calculated first. Use *duxf for streaming interface.

  cduxa($func, $icallback) => ARRAYREF
  cduxc($func, $icallback, $ocallback)
  cduxf($func, $icallback) => FILEHANDLE
  cduxl($func, $icallback) => LIST (OR SCALAR)
    The "cdux*" functions accepts a callback ($icallback) to get input
    elements from. Input callback function should return a list of one or
    more elements, or an empty list to signal end of stream.

    An example:

     cduxa($func, sub {
         state $a = [1,2,3,4];
         if (@$a) {
             return shift(@$a);
         } else {
             return ();
         }
     });

  fduxa($func, $file_or_handle, @args) => ARRAYREF
  fduxc($func, $callback, $file_or_handle, @args)
  fduxf($func, $file_or_handle, @args) => FILEHANDLE
  fduxl($func, $file_or_handle, @args) => LIST
    The "fdux*" functions accepts filename or filehandle. @args is optional
    and will be passed to Tie::File.

  lduxa($func, @input) => ARRAYREF
  lduxc($func, $callback, @input)
  lduxf($func, @input) => FILEHANDLE
  lduxl($func, @input) => LIST
    The "ldux*" functions accepts list as input.

    None are exported by default, but they are exportable.

FAQ
  I'm getting "Use of uninitialized value in push at lib/Data/Unixish/XXX.pm line XX." messages!
    This looks like a bug in perl 5.10.1 or earlier. Try upgrading to perl
    5.12 or later.

  How do I use the diamond operator as input?
    You can use Tie::Diamond, e.g.:

     use Tie::Diamond;
     tie my(@in), "Tie::Diamond";
     my $out = aduxa($func, \@in);

    Also see the dux command-line utility in the App::dux distribution which
    allows you to access dux function from the command-line.

SEE ALSO
    Unixish

    dux script in App::dux

HOMEPAGE
    Please visit the project's homepage at
    <https://metacpan.org/release/Data-Unixish>.

SOURCE
    Source repository is at
    <https://github.com/sharyanto/perl-Data-Unixish>.

BUGS
    Please report any bugs or feature requests on the bugtracker website
    <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.

AUTHOR
    Steven Haryanto <stevenharyanto@gmail.com>

COPYRIGHT AND LICENSE
    This software is copyright (c) 2013 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.