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#!/usr/bin/perl |
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#------------------------------------------------------------------------------- |
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# Trim various things by removing leading and trailing whitespace. |
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# Philip R Brenan at appaapps dot com, Appa Apps Ltd Inc., 2021 |
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#------------------------------------------------------------------------------- |
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# podDocumentation |
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package Trim; |
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our $VERSION = "20210401"; |
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use warnings FATAL => qw(all); |
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use strict; |
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use feature qw(say current_sub); |
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1101
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#D1 Trim # Trim strings, arrays, hashes in situ and clones thereof. |
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sub trim(@) # Trim somethings. |
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{my (@things) = @_; # Things to be trimmed |
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if (@_ == 0) # Trim $_ as no argument specified |
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{if (!defined(wantarray)) # Void context - trim in place |
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{if (!ref) # Scalar string in $_ in void context |
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{s/\A\s+|\s+\Z//gs; |
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} |
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elsif (ref eq q(ARRAY)) # Array referenced from $_ in void context |
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{for my $i(keys @$_) |
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{$$_[$i] = __SUB__->($$_[$i]); |
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} |
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} |
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elsif (ref eq q(HASH)) # Hash referenced from $_ in void context |
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{for my $k(keys %$_) |
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{$$_{$k} = __SUB__->($$_{$k}); |
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} |
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} |
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} |
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else # Not void context - caller wants something back |
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{if (!ref) # Scalar string in $_ in non void context |
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{return __SUB__->($_); |
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} |
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elsif (ref eq q(ARRAY)) # Array referenced from $_ in non void context |
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{return [__SUB__->(@$_)]; |
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} |
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elsif (ref eq q(HASH)) # Hash referenced from $_ in non void context |
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{return {__SUB__->(%$_)}; |
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} |
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} |
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} |
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else # Arguments specified |
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{if (!defined(wantarray)) # Void context - trim in place |
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{for my $i(keys @_) |
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{if (!ref $_[$i]) # Trim scalar in void context |
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{$_[$i] = __SUB__->($_[$i]); |
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} |
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elsif (ref($_[$i]) eq q(ARRAY)) # Trim array reference in void context |
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{for my $j(keys $_[$i]->@*) |
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{$_[$i][$j] = __SUB__->($_[$i][$j]); |
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} |
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} |
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elsif (ref($_[$i]) eq q(HASH)) # Trim hash reference in void context |
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{for my $k(keys $_[$i]->%*) |
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{$_[$i]{$k} = __SUB__->($_[$i]{$k}); |
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} |
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} |
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} |
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} |
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else # Want something back |
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{my @r; |
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for my $i(keys @_) |
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{if ( !ref $_[$i]) # Trim clone of scalar and return cloned value |
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{push @r, $_[$i] =~ s/\A\s+|\s+\Z//gsr; |
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return $r[0] if @_ == 1; |
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} |
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elsif (ref($_[$i]) eq q(ARRAY)) # Trim clone of array reference and return cloned value |
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{my @a; |
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for my $j(keys $_[$i]->@*) |
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{push @a, __SUB__->($_[$i][$j]); |
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} |
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push @r, [@a]; |
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return $r[0] if @_ == 1; |
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} |
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elsif (ref($_[$i]) eq q(HASH)) # Trim clone of hash reference and return cloned value |
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{my @a; |
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for my $k(keys $_[$i]->%*) |
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{push @a, (__SUB__->($k), __SUB__->($_[$i]{$k})); |
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} |
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push @r, {@a}; |
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return $r[0] if @_ == 1; |
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} |
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} |
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return wantarray ? @r : @_ == $r[-1]; # Return array if requested else last element trimmed |
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} |
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} |
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} |
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#d |
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#------------------------------------------------------------------------------- |
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# Export - eeee |
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#------------------------------------------------------------------------------- |
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use Exporter qw(import); |
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use vars qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS); |
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@ISA = qw(Exporter); |
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@EXPORT = qw(trim); |
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@EXPORT_OK = qw(); |
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%EXPORT_TAGS = (all=>[@EXPORT, @EXPORT_OK]); |
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# podDocumentation |
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=pod |
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=encoding utf-8 |
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=head1 Name |
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Trim - Trim various things by removing leading and trailing whitespace |
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=head1 Synopsis |
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Trim nested structures in situ referenced from $_: |
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{$_ = [" a ", " b ", {" c " => {" d\n ", " e "}}]; |
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trim; |
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is_deeply $_, ["a", "b", { c => { d => "e" } }]; |
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} |
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Trim nested structures in situ: |
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{my $a = [" a ", " b ", {" c " => {" d\n ", " e "}}]; |
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trim $a; |
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is_deeply $a, ["a", "b", { c => { d => "e" } }]; |
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} |
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Trim cloned nested structures: |
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{my $a = [" a ", " b ", {" c " => {" d\n ", " e "}}]; |
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my $b = trim $a; |
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is_deeply $b, ["a", "b", { c => { d => "e" } }]; |
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} |
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=head1 Description |
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Trim various things by removing leading and trailing whitespace |
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Version "20210401". |
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147
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The following sections describe the methods in each functional area of this |
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module. For an alphabetic listing of all methods by name see L. |
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152
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=head1 Trim |
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Trim strings, arrays, hashes in situ and clones thereof. |
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=head2 trim(@things) |
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Trim somethings. |
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Parameter Description |
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1 @things Things to be trimmed |
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B |
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$_ = [" a ", " b ", {" c " => {" d ", " e "}}]; # Trim nested structures in situ referenced from $_ |
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168
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trim; # 𝗘𝘅𝗮𝗺𝗽𝗹𝗲 |
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is_deeply $_, ["a", "b", { c => { d => "e" } }]; |
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} |
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{my $a = [" a ", " b ", {" c " => {" d ", " e "}}]; # Trim nested structures in situ |
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trim $a; # 𝗘𝘅𝗮𝗺𝗽𝗹𝗲 |
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is_deeply $a, ["a", "b", { c => { d => "e" } }]; |
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} |
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{my $a = [" a ", " b ", {" c " => {" d ", " e "}}]; # Trim cloned nested structures |
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my $b = trim $a; # 𝗘𝘅𝗮𝗺𝗽𝗹𝗲 |
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is_deeply $b, ["a", "b", { c => { d => "e" } }]; |
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=head1 Index |
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191
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1 L - Trim somethings. |
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=head1 Installation |
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This module is written in 100% Pure Perl and, thus, it is easy to read, |
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comprehend, use, modify and install via B: |
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sudo cpan install Trim |
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=head1 Author |
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L |
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L |
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=head1 Copyright |
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Copyright (c) 2016-2021 Philip R Brenan. |
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This module is free software. It may be used, redistributed and/or modified |
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under the same terms as Perl itself. |
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=cut |
214
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215
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216
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217
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# Tests and documentation |
218
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219
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sub test |
220
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1
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1
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0
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8
|
{my $p = __PACKAGE__; |
221
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1
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|
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11
|
binmode($_, ":utf8") for *STDOUT, *STDERR; |
222
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1
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50
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|
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|
70
|
return if eval "eof(${p}::DATA)"; |
223
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1
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56
|
my $s = eval "join('', <${p}::DATA>)"; |
224
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1
|
50
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10
|
$@ and die $@; |
225
|
1
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1
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|
693
|
eval $s; |
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1
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1
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1593
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1
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5
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1
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1017
|
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1
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72299
|
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1
|
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14
|
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1
|
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85
|
|
226
|
1
|
50
|
|
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|
1046
|
$@ and die $@; |
227
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1
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|
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144
|
1 |
228
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} |
229
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230
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test unless caller; |
231
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232
|
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1; |
233
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# podDocumentation |
234
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__DATA__ |