use 5.010;
use strict;
use syntax 'each_on_array'; # to support perl < 5.12
#use Log::Any '$log';
use Data::Unixish::Util qw(%common_args);
our $VERSION = '1.31'; # VERSION
our %SPEC;
$SPEC{ltrim} = {
v => 1.1,
summary => 'Strip whitespace at the beginning of each line of text',
description => <<'_',
_
args => {
%common_args,
strip_newline => {
summary => 'Whether to strip newlines at the beginning of text',
schema =>[bool => {default=>0}],
cmdline_aliases => { nl=>{} },
},
},
tags => [qw/text/],
};
sub ltrim {
my %args = @_;
my ($in, $out) = ($args{in}, $args{out});
my $nl = $args{nl} // 0;
while (my ($index, $item) = each @$in) {
my @lt;
if (defined($item) && !ref($item)) {
$item =~ s/\A[\r\n]+// if $nl;
$item =~ s/^[ \t]+//mg;
}
push @$out, $item;
}
[200, "OK"];
}
1;
# ABSTRACT: Strip whitespace at the beginning of each line of text
__END__
=pod
=head1 NAME
Data::Unixish::ltrim - Strip whitespace at the beginning of each line of text
=head1 VERSION
version 1.31
=head1 SYNOPSIS
In Perl:
use Data::Unixish::List qw(dux);
my @res = dux('ltrim', "x", " a", " b\n c\n", undef, [" d"]);
# => ("x", "a", "b\nc\n", undef, [" d"])
In command line:
% echo -e "x\n a" | dux ltrim
x
a
=head1 AUTHOR
Steven Haryanto <stevenharyanto@gmail.com>
=head1 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.
=head1 FUNCTIONS
=head2 ltrim() -> [status, msg, result, meta]
No arguments.
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.
=cut