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package SHARYANTO::String::Util; |
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20467
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use 5.010001; |
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use strict; |
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use warnings; |
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our $VERSION = '0.28'; # VERSION |
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use Exporter; |
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our @ISA = qw(Exporter); |
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our @EXPORT_OK = qw( |
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ltrim |
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rtrim |
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trim |
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ltrim_lines |
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rtrim_lines |
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trim_lines |
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trim_blank_lines |
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ellipsis |
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indent |
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linenum |
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pad |
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qqquote |
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single_quote |
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double_quote |
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common_prefix |
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common_suffix |
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); |
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sub ltrim { |
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my $str = shift; |
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$str =~ s/\A\s+//s; |
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$str; |
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} |
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sub rtrim { |
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my $str = shift; |
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$str =~ s/\s+\z//s; |
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$str; |
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} |
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sub trim { |
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my $str = shift; |
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$str =~ s/\A\s+//s; |
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$str =~ s/\s+\z//s; |
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$str; |
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} |
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sub ltrim_lines { |
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my $str = shift; |
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$str =~ s/^[ \t]+//mg; # XXX other unicode non-newline spaces |
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$str; |
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} |
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sub rtrim_lines { |
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my $str = shift; |
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$str =~ s/[ \t]+$//mg; |
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$str; |
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} |
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sub trim_lines { |
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my $str = shift; |
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$str =~ s/^[ \t]+//mg; |
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$str =~ s/[ \t]+$//mg; |
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$str; |
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} |
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sub trim_blank_lines { |
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1307
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local $_ = shift; |
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100
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15
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return $_ unless defined; |
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s/\A(?:\n\s*)+//; |
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s/(?:\n\s*){2,}\z/\n/; |
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$_; |
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} |
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sub ellipsis { |
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my ($str, $maxlen, $ellipsis) = @_; |
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$maxlen //= 80; |
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100
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$ellipsis //= "..."; |
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if (length($str) <= $maxlen) { |
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return $str; |
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} else { |
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return substr($str, 0, $maxlen-length($ellipsis)) . $ellipsis; |
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} |
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} |
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sub indent { |
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my ($indent, $str, $opts) = @_; |
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100
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496
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$opts //= {}; |
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92
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2
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100
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100
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if ($opts->{indent_blank_lines} // 1) { |
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$str =~ s/^/$indent/mg; |
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} else { |
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1
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$str =~ s/^([^\r\n]*\S[^\r\n]*)/$indent$1/mg; |
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} |
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2
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$str; |
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} |
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100
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sub linenum { |
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my ($str, $opts) = @_; |
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100
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13
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$opts //= {}; |
103
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4
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100
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17
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$opts->{width} //= 4; |
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15
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$opts->{zeropad} //= 0; |
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4
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$opts->{skip_empty} //= 1; |
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107
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4
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6
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my $i = 0; |
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4
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20
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$str =~ s/^(([\t ]*\S)?.*)/ |
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277
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sprintf(join("", |
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110
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"%", |
111
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($opts->{zeropad} && !($opts->{skip_empty} |
112
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&& !defined($2)) ? "0" : ""), |
113
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$opts->{width}, "s", |
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"|%s"), |
115
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++$i && $opts->{skip_empty} && !defined($2) ? "" : $i, |
116
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$1)/meg; |
117
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118
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4
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22
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$str; |
119
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} |
120
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121
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sub pad { |
122
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7
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7
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1
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747
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my ($text, $width, $which, $padchar, $is_trunc) = @_; |
123
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7
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100
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18
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if ($which) { |
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6
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$which = substr($which, 0, 1); |
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} else { |
126
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4
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8
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$which = "r"; |
127
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} |
128
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100
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30
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$padchar //= " "; |
129
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130
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7
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11
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my $w = length($text); |
131
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100
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66
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24
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if ($is_trunc && $w > $width) { |
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4
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$text = substr($text, 0, $width, 1); |
133
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} else { |
134
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6
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100
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23
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if ($which eq 'l') { |
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100
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135
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1
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4
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$text = ($padchar x ($width-$w)) . $text; |
136
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} elsif ($which eq 'c') { |
137
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2
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5
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my $n = int(($width-$w)/2); |
138
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2
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7
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$text = ($padchar x $n) . $text . ($padchar x ($width-$w-$n)); |
139
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} else { |
140
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3
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10
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$text .= ($padchar x ($width-$w)); |
141
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} |
142
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} |
143
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7
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30
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$text; |
144
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} |
145
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146
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# BEGIN COPY PASTE FROM Data::Dump |
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my %esc = ( |
148
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"\a" => "\\a", |
149
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"\b" => "\\b", |
150
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"\t" => "\\t", |
151
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"\n" => "\\n", |
152
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"\f" => "\\f", |
153
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"\r" => "\\r", |
154
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"\e" => "\\e", |
155
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); |
156
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157
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# put a string value in double quotes |
158
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sub double_quote { |
159
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4
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4
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1
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1918
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local($_) = $_[0]; |
160
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# If there are many '"' we might want to use qq() instead |
161
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4
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27
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s/([\\\"\@\$])/\\$1/g; |
162
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4
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100
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39
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return qq("$_") unless /[^\040-\176]/; # fast exit |
163
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164
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1
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8
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s/([\a\b\t\n\f\r\e])/$esc{$1}/g; |
165
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166
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# no need for 3 digits in escape for these |
167
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1
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3
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s/([\0-\037])(?!\d)/sprintf('\\%o',ord($1))/eg; |
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0
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168
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169
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1
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3
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s/([\0-\037\177-\377])/sprintf('\\x%02X',ord($1))/eg; |
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0
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170
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1
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3
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s/([^\040-\176])/sprintf('\\x{%X}',ord($1))/eg; |
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0
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171
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172
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1
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5
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return qq("$_"); |
173
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} |
174
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# END COPY PASTE FROM Data::Dump |
175
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176
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# old name, deprecated, will be removed in the future |
177
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0
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0
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0
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0
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sub qqquote { goto &double_quote; } |
178
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179
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# will write this in the future, will produce "qq(...)" and "q(...)" literal |
180
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# representation |
181
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#sub qq_quote {} |
182
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#sub q_quote {} |
183
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184
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sub single_quote { |
185
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2
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2
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1
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902
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local($_) = $_[0]; |
186
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2
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21
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s/([\\'])/\\$1/g; |
187
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2
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23
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return qq('$_'); |
188
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} |
189
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190
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sub common_prefix { |
191
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6
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50
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6
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1
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865
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return undef unless @_; |
192
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6
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12
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my $i; |
193
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L1: |
194
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6
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26
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for ($i=0; $i < length($_[0]); $i++) { |
195
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6
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22
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for (@_[1..$#_]) { |
196
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9
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50
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23
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if (length($_) < $i) { |
197
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0
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0
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$i--; last L1; |
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0
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0
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198
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} else { |
199
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9
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100
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57
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last L1 if substr($_, $i, 1) ne substr($_[0], $i, 1); |
200
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} |
201
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} |
202
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} |
203
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6
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33
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substr($_[0], 0, $i); |
204
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} |
205
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206
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sub common_suffix { |
207
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6
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6
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1
|
1081
|
require List::Util; |
208
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209
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6
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50
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22
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return undef unless @_; |
210
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6
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9
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my $i; |
211
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L1: |
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for ($i = 0; $i < length($_[0]); $i++) { |
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$i--; last L1; |
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} else { |
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last L1 if substr($_, -($i+1), 1) ne substr($_[0], -($i+1), 1); |
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} |
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} |
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} |
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$i ? substr($_[0], -$i) : ""; |
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} |
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1; |
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# ABSTRACT: String utilities |
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__END__ |
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=pod |
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=encoding UTF-8 |
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=head1 NAME |
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SHARYANTO::String::Util - String utilities |
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=head1 VERSION |
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This document describes version 0.28 of SHARYANTO::String::Util (from Perl distribution SHARYANTO-String-Util), released on 2014-07-25. |
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=for Pod::Coverage ^(qqquote)$ |
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=head1 FUNCTIONS |
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=head2 ltrim($str) => STR |
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Trim whitespaces (including newlines) at the beginning of string. Equivalent to: |
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$str =~ s/\A\s+//s; |
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=head2 ltrim_lines($str) => STR |
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Trim whitespaces (not including newlines) at the beginning of each line of |
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string. Equivalent to: |
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$str =~ s/^\s+//mg; |
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=head2 rtrim($str) => STR |
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Trim whitespaces (including newlines) at the end of string. Equivalent to: |
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$str =~ s/[ \t]+\z//s; |
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=head2 rtrim_lines($str) => STR |
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Trim whitespaces (not including newlines) at the end of each line of |
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string. Equivalent to: |
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$str =~ s/[ \t]+$//mg; |
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=head2 trim($str) => STR |
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ltrim + rtrim. |
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=head2 trim_lines($str) => STR |
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ltrim_lines + rtrim_lines. |
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=head2 trim_blank_lines($str) => STR |
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Trim blank lines at the beginning and the end. Won't trim blank lines in the |
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middle. Blank lines include lines with only whitespaces in them. |
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=head2 ellipsis($str[, $maxlen, $ellipsis]) => STR |
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Return $str unmodified if $str's length is less than $maxlen (default 80). |
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Otherwise cut $str to ($maxlen - length($ellipsis)) and append $ellipsis |
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(default '...') at the end. |
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=head2 indent($indent, $str, \%opts) => STR |
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Indent every line in $str with $indent. Example: |
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indent(' ', "one\ntwo\nthree") # " one\n two\n three" |
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%opts is optional. Known options: |
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=over 4 |
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=item * indent_blank_lines => BOOL (default 1) |
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If set to false, does not indent blank lines (i.e., lines containing only zero |
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or more whitespaces). |
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=back |
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=head2 linenum($str, \%opts) => STR |
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Add line numbers. For example: |
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1|line1 |
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2|line2 |
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4|line4 |
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Known options: |
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=over 4 |
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=item * width => INT (default: 4) |
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=item * zeropad => BOOL (default: 0) |
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If turned on, will output something like: |
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0001|line1 |
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0002|line2 |
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0004|line4 |
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=item * skip_empty => BOOL (default: 1) |
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If set to false, keep printing line number even if line is empty: |
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1|line1 |
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2|line2 |
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3| |
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4|line4 |
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=back |
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=head2 pad($text, $width[, $which[, $padchar[, $truncate]]]) => STR |
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Return C<$text> padded with C<$padchar> to C<$width> columns. C<$which> is |
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either "r" or "right" for padding on the right (the default if not specified), |
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"l" or "left" for padding on the right, or "c" or "center" or "centre" for |
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left+right padding to center the text. |
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C<$padchar> is whitespace if not specified. It should be string having the width |
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of 1 column. |
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=head2 double_quote($str) => STR |
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Quote or encode C<$str> to the Perl double quote (C<">) literal representation |
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of the string. Example: |
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say double_quote("a"); # => "a" (with the quotes) |
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say double_quote("a\n"); # => "a\n" |
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say double_quote('"'); # => "\"" |
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say double_quote('$foo'); # => "\$foo" |
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This code is taken from C<quote()> in L<Data::Dump>. Maybe I didn't look more |
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closely, but I couldn't a module that provides a function to do something like |
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this. L<String::Escape>, for example, provides C<qqbackslash> but it does not |
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escape C<$>. |
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=head2 single_quote($str) => STR |
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Like C<double_quote> but will produce a Perl single quote literal representation |
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instead of the double quote ones. In single quotes, only literal backslash C<\> |
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and single quote character C<'> are escaped, the rest are displayed as-is, so |
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the result might span multiple lines or contain other non-printable characters. |
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say single_quote("Mom's"); # => 'Mom\'s' (with the quotes) |
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say single_quote("a\\"); # => 'a\\" |
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say single_quote('"'); # => '"' |
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say single_quote("\$foo"); # => '$foo' |
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=head2 common_prefix(@LIST) => STR |
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Given a list of strings, return common prefix. |
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=head2 common_suffix(@LIST) => STR |
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Given a list of strings, return common suffix. |
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=head1 SEE ALSO |
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389
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L<SHARYANTO> |
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=head1 HOMEPAGE |
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Please visit the project's homepage at L<https://metacpan.org/release/SHARYANTO-String-Util>. |
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=head1 SOURCE |
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Source repository is at L<https://github.com/sharyanto/perl-SHARYANTO-String-Util>. |
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399
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=head1 BUGS |
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401
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Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=SHARYANTO-String-Util> |
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403
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When submitting a bug or request, please include a test-file or a |
404
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patch to an existing test-file that illustrates the bug or desired |
405
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feature. |
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407
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=head1 AUTHOR |
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Steven Haryanto <stevenharyanto@gmail.com> |
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411
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=head1 COPYRIGHT AND LICENSE |
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413
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This software is copyright (c) 2014 by Steven Haryanto. |
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415
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This is free software; you can redistribute it and/or modify it under |
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the same terms as the Perl 5 programming language system itself. |
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=cut |