1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
package String::Trim;
# ABSTRACT: trim whitespace from your strings
use strict;
use warnings;
our $VERSION = '0.005'; # VERSION
use Exporter 5.57 qw(import);
our @EXPORT = qw(trim);
sub trim { # Starting point: http://www.perlmonks.org/?node_id=36684
my $t = qr{^\s+|\s+$};
if (defined wantarray) {
@_ = (@_ ? @_ : $_);
if (ref $_[0] eq 'ARRAY') {
@_ = @{ $_[0] };
for (@_) { s{$t}{}g if defined $_ }
return \@_;
}
elsif (ref $_[0] eq 'HASH') {
foreach my $k (keys %{ $_[0] }) {
(my $nk = $k) =~ s{$t}{}g;
if (defined $_[0]->{$k}) {
($_[0]->{$nk} = $_[0]->{$k}) =~ s{$t}{}g;
}
else {
$_[0]->{$nk} = undef;
}
delete $_[0]->{$k} unless $k eq $nk;
}
}
else {
for (@_ ? @_ : $_) { s{$t}{}g if defined $_ }
}
return wantarray ? @_ : $_[0];
}
else {
if (ref $_[0] eq 'ARRAY') {
for (@{ $_[0] }) { s{$t}{}g if defined $_ }
}
elsif (ref $_[0] eq 'HASH') {
foreach my $k (keys %{ $_[0] }) {
(my $nk = $k) =~ s{$t}{}g;
if (defined $_[0]->{$k}) {
($_[0]->{$nk} = $_[0]->{$k}) =~ s{$t}{}g;
}
else {
$_[0]->{$nk} = undef;
}
delete $_[0]->{$k} unless $k eq $nk
}
}
else {
for (@_ ? @_ : $_) { s{$t}{}g if defined $_ }
}
}
}
1;
=pod
=encoding utf-8
=head1 NAME
String::Trim - trim whitespace from your strings
=head1 VERSION
version 0.005
=head1 SYNOPSIS
use String::Trim;
print "Do it? ";
trim(my $response = <>);
print "'$response'\n";
=head1 DESCRIPTION
C<String::Trim> trims whitespace off your strings. L<chomp> trims only C<$/> (typically,
that's newline), but C<trim> will trim all leading and trailing whitespace.
=head1 FUNCTIONS
=head2 trim
Returns the string with all leading and trailing whitespace removed. Trimming
undef gives you undef. Alternatively, you can trim in-place.
my $var = ' my string ';
my $trimmed = trim($var);
# OR
trim($var);
C<trim> also knows how to trim an array or arrayref:
my @to_trim = (' one ', ' two ', ' three ');
my @trimmed = trim(@to_trim);
# OR
trim(@to_trim);
# OR
my $trimmed = trim(\@to_trim);
# OR
trim(\@to_trim);
=head1 RATIONALE
C<trim> is often used by beginners, who may not understand how to spin their own. While
L<String::Util> does have a C<trim> function, it depends on L<Debug::ShowStuff>, which
depends on L<Taint>, which fails the test suite, and doesn't appear to be maintained.
This module installs, is actively maintained, and has no non-core dependencies.
Other options include L<Text::Trim> and L<String::Strip> (which is implemented in XS,
and is therefore likely to be very fast, but requires a C compiler).
=head1 AVAILABILITY
The latest version of this module is available from the Comprehensive Perl
Archive Network (CPAN). Visit L<http://www.perl.com/CPAN/> to find a CPAN
site near you, or see L<http://search.cpan.org/dist/String-Trim/>.
The development version lives at L<http://github.com/doherty/String-Trim>
and may be cloned from L<git://github.com/doherty/String-Trim.git>.
Instead of sending patches, please fork this project using the standard
git and github infrastructure.
=head1 SOURCE
The development version is on github at L<http://github.com/doherty/String-Trim>
and may be cloned from L<git://github.com/doherty/String-Trim.git>
=head1 BUGS AND LIMITATIONS
No bugs have been reported.
Please report any bugs or feature requests through the web interface at
L<https://github.com/doherty/String-Trim/issues>.
=head1 CREDITS
This module was inspired by code at L<http://www.perlmonks.org/?node_id=36684> written
by japhy (Jeff Pinyan), dragonchild, and Aristotle. This Perl module was written by Mike
Doherty.
=head1 AUTHORS
=over 4
=item *
Mike Doherty <doherty@cpan.org>
=item *
Jeff Pinyan <pinyan@cpan.org>
=item *
Rob Kinyon <rkinyon@cpan.org>
=item *
Αριστοτέλης Παγκαλτζής (Aristotle Pagaltzis) <aristotle@cpan.org>
=back
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2010 by Mike Doherty.
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
__END__
|
