NAME Data::Unixish - Implementation for Unixish, a data transformation framework VERSION This document describes version 1.572 of Data::Unixish (from Perl distribution Data-Unixish), released on 2019-10-26. 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 siduxs ); # 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>; # apply function to a single item, function must be itemfunc my $res = duxitem(, $item); # apply function to multiple items, function must be itemfunc my @res = aduxitem(, $item1, $item2, $item3); DESCRIPTION This distribution implements Unixish, a data transformation framework inspired by Unix toolbox philosophy. FUNCTIONS The functions are not exported by default. They can be exported individually or altogether using export tag ":all". aduxa($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. (Currently not yet supported on Windows due to no support for open '-|'). 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, $file_or_handle, @args) => LIST The "fdux*" functions accepts filename or filehandle. @args is optional and will be passed to Tie::File. Currently not yet supported on Windows. lduxa($func, @input) => ARRAYREF lduxc($func, $callback, @input) lduxf($func, @input) => FILEHANDLE lduxl($func, @input) => LIST The "ldux*" functions accepts list as input. siduxs($func, $item) => $res aiduxa($func, \@items) => ARRAYREF aiduxl($func, \@items) => LIST liduxa($func, @items) => ARRAYREF liduxl($func, @items) => LIST The "*idux*" functions apply dux function on single item(s). Only dux functions tagged with "itemfunc" can be used. These functions can operate on a single item and return a single result. Examples of itemfunc functions are "uc", "lc", "sprintf". Examples of non-itemfunc functions are "head", "tail", "wc". The "*idux*" functions can be useful if you want to call a dux function from another dux function for each item. For example, see "Data::Unixish::condapply". 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. HOMEPAGE Please visit the project's homepage at . SOURCE Source repository is at . BUGS Please report any bugs or feature requests on the bugtracker website 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. SEE ALSO Unixish dux script in App::dux AUTHOR perlancar COPYRIGHT AND LICENSE This software is copyright (c) 2019, 2017, 2016, 2015, 2014, 2013, 2012 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.