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1 | |
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2 | package Moose::Meta::Attribute::Native::Trait::Array; |
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3 | use Moose::Role; |
4 | |
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5 | our $VERSION = '1.14'; |
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6 | $VERSION = eval $VERSION; |
7 | our $AUTHORITY = 'cpan:STEVAN'; |
8 | |
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9 | use Moose::Meta::Method::Accessor::Native::Array::accessor; |
10 | use Moose::Meta::Method::Accessor::Native::Array::clear; |
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11 | use Moose::Meta::Method::Accessor::Native::Array::count; |
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12 | use Moose::Meta::Method::Accessor::Native::Array::delete; |
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13 | use Moose::Meta::Method::Accessor::Native::Array::elements; |
14 | use Moose::Meta::Method::Accessor::Native::Array::first; |
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15 | use Moose::Meta::Method::Accessor::Native::Array::get; |
16 | use Moose::Meta::Method::Accessor::Native::Array::grep; |
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17 | use Moose::Meta::Method::Accessor::Native::Array::insert; |
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18 | use Moose::Meta::Method::Accessor::Native::Array::is_empty; |
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19 | use Moose::Meta::Method::Accessor::Native::Array::join; |
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20 | use Moose::Meta::Method::Accessor::Native::Array::map; |
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21 | use Moose::Meta::Method::Accessor::Native::Array::natatime; |
22 | use Moose::Meta::Method::Accessor::Native::Array::pop; |
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23 | use Moose::Meta::Method::Accessor::Native::Array::push; |
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24 | use Moose::Meta::Method::Accessor::Native::Array::reduce; |
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25 | use Moose::Meta::Method::Accessor::Native::Array::set; |
26 | use Moose::Meta::Method::Accessor::Native::Array::shift; |
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27 | use Moose::Meta::Method::Accessor::Native::Array::shuffle; |
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28 | use Moose::Meta::Method::Accessor::Native::Array::splice; |
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29 | use Moose::Meta::Method::Accessor::Native::Array::sort; |
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30 | use Moose::Meta::Method::Accessor::Native::Array::sort_in_place; |
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31 | use Moose::Meta::Method::Accessor::Native::Array::uniq; |
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32 | use Moose::Meta::Method::Accessor::Native::Array::unshift; |
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33 | |
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34 | with 'Moose::Meta::Attribute::Native::Trait'; |
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35 | |
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36 | sub _helper_type { 'ArrayRef' } |
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37 | |
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38 | sub _native_type { 'Array' } |
39 | |
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40 | no Moose::Role; |
41 | |
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42 | 1; |
43 | |
44 | __END__ |
45 | |
46 | =pod |
47 | |
48 | =head1 NAME |
49 | |
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50 | Moose::Meta::Attribute::Native::Trait::Array - Helper trait for ArrayRef attributes |
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51 | |
52 | =head1 SYNOPSIS |
53 | |
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54 | package Stuff; |
55 | use Moose; |
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56 | |
57 | has 'options' => ( |
58 | traits => ['Array'], |
59 | is => 'ro', |
60 | isa => 'ArrayRef[Str]', |
61 | default => sub { [] }, |
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62 | handles => { |
63 | all_options => 'elements', |
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64 | add_option => 'push', |
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65 | map_options => 'map', |
66 | filter_options => 'grep', |
67 | find_option => 'first', |
68 | get_option => 'get', |
69 | join_options => 'join', |
70 | count_options => 'count', |
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71 | has_options => 'count', |
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72 | has_no_options => 'is_empty', |
73 | sorted_options => 'sort', |
74 | }, |
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75 | ); |
76 | |
77 | no Moose; |
78 | 1; |
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79 | |
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80 | =head1 DESCRIPTION |
81 | |
82 | This module provides an Array attribute which provides a number of |
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83 | array operations. |
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84 | |
85 | =head1 PROVIDED METHODS |
86 | |
87 | These methods are implemented in |
88 | L<Moose::Meta::Attribute::Native::MethodProvider::Array>. |
89 | |
90 | =over 4 |
91 | |
92 | =item B<count> |
93 | |
94 | Returns the number of elements in the array. |
95 | |
96 | $stuff = Stuff->new; |
97 | $stuff->options(["foo", "bar", "baz", "boo"]); |
98 | |
99 | my $count = $stuff->count_options; |
100 | print "$count\n"; # prints 4 |
101 | |
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102 | =item B<is_empty> |
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103 | |
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104 | Returns a boolean value that is true when the array has no elements. |
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105 | |
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106 | $stuff->has_no_options ? die "No options!\n" : print "Good boy.\n"; |
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107 | |
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108 | =item B<elements> |
109 | |
110 | Returns all of the elements of the array. |
111 | |
112 | my @option = $stuff->all_options; |
113 | print "@options\n"; # prints "foo bar baz boo" |
114 | |
115 | =item B<get($index)> |
116 | |
117 | Returns an element of the array by its index. You can also use negative index |
118 | numbers, just as with Perl's core array handling. |
119 | |
120 | my $option = $stuff->get_option(1); |
121 | print "$option\n"; # prints "bar" |
122 | |
123 | =item B<pop> |
124 | |
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125 | =item B<push($value1, $value2, value3 ...)> |
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126 | |
127 | =item B<shift> |
128 | |
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129 | =item B<unshift($value1, $value2, value3 ...)> |
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130 | |
131 | =item B<splice($offset, $length, @values)> |
132 | |
133 | These methods are all equivalent to the Perl core functions of the same name. |
134 | |
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135 | =item B<first( sub { ... } )> |
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136 | |
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137 | This method returns the first item matching item in the array, just like |
138 | L<List::Util>'s C<first> function. The matching is done with a subroutine |
139 | reference you pass to this method. The reference will be called against each |
140 | element in the array until one matches or all elements have been checked. |
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141 | |
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142 | my $found = $stuff->find_option( sub { /^b/ } ); |
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143 | print "$found\n"; # prints "bar" |
144 | |
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145 | =item B<grep( sub { ... } )> |
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146 | |
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147 | This method returns every element matching a given criteria, just like Perl's |
148 | core C<grep> function. This method requires a subroutine which implements the |
149 | matching logic. |
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150 | |
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151 | my @found = $stuff->filter_options( sub { /^b/ } ); |
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152 | print "@found\n"; # prints "bar baz boo" |
153 | |
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154 | =item B<map( sub { ... } )> |
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155 | |
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156 | This method transforms every element in the array and returns a new array, |
157 | just like Perl's core C<map> function. This method requires a subroutine which |
158 | implements the transformation. |
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159 | |
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160 | my @mod_options = $stuff->map_options( sub { $_ . "-tag" } ); |
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161 | print "@mod_options\n"; # prints "foo-tag bar-tag baz-tag boo-tag" |
162 | |
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163 | =item B<reduce( sub { ... } )> |
164 | |
165 | This method condenses an array into a single value, by passing a function the |
166 | value so far and the next value in the array, just like L<List::Util>'s |
167 | C<reduce> function. The reducing is done with a subroutine reference you pass |
168 | to this method. |
169 | |
170 | my $found = $stuff->reduce_options( sub { $_[0] . $_[1] } ); |
171 | print "$found\n"; # prints "foobarbazboo" |
172 | |
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173 | =item B<sort( sub { ... } )> |
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174 | |
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175 | Returns a the array in sorted order. |
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176 | |
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177 | You can provide an optional subroutine reference to sort with (as you can with |
178 | Perl's core C<sort> function). However, instead of using C<$a> and C<$b>, you |
179 | will need to use C<$_[0]> and C<$_[1]> instead. |
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180 | |
181 | # ascending ASCIIbetical |
182 | my @sorted = $stuff->sort_options(); |
183 | |
184 | # Descending alphabetical order |
185 | my @sorted_options = $stuff->sort_options( sub { lc $_[1] cmp lc $_[0] } ); |
186 | print "@sorted_options\n"; # prints "foo boo baz bar" |
187 | |
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188 | =item B<sort_in_place> |
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189 | |
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190 | Sorts the array I<in place>, modifying the value of the attribute. |
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191 | |
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192 | You can provide an optional subroutine reference to sort with (as you can with |
193 | Perl's core C<sort> function). However, instead of using C<$a> and C<$b>, you |
194 | will need to use C<$_[0]> and C<$_[1]> instead. |
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195 | |
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196 | =item B<shuffle> |
197 | |
198 | Returns the array, with indices in random order, like C<shuffle> from |
199 | L<List::Util>. |
200 | |
201 | =item B<uniq> |
202 | |
203 | Returns the array, with all duplicate elements removed, like C<uniq> from |
204 | L<List::MoreUtils>. |
205 | |
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206 | =item B<join($str)> |
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207 | |
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208 | Joins every element of the array using the separator given as argument, just |
209 | like Perl's core C<join> function. |
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210 | |
211 | my $joined = $stuff->join_options( ':' ); |
212 | print "$joined\n"; # prints "foo:bar:baz:boo" |
213 | |
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214 | =item B<set($index, $value)> |
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215 | |
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216 | Given an index and a value, sets the specified array element's value. |
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217 | |
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218 | =item B<delete($index)> |
219 | |
220 | Removes the element at the given index from the array. |
221 | |
222 | =item B<insert($index, $value)> |
223 | |
224 | Inserts a new element into the array at the given index. |
225 | |
226 | =item B<clear> |
227 | |
228 | Empties the entire array, like C<@array = ()>. |
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229 | |
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230 | =item B<accessor> |
231 | |
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232 | This method provides a get/set accessor for the array, based on array indexes. |
233 | If passed one argument, it returns the value at the specified index. If |
234 | passed two arguments, it sets the value of the specified index. |
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235 | |
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236 | =item B<natatime($n, $code)> |
237 | |
238 | This method returns an iterator which, on each call, returns C<$n> more items |
239 | from the array, in order, like C<natatime> from L<List::MoreUtils>. A coderef |
240 | can optionally be provided; it will be called on each group of C<$n> elements |
241 | in the array. |
242 | |
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243 | =back |
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244 | |
245 | =head1 METHODS |
246 | |
247 | =over 4 |
248 | |
249 | =item B<meta> |
250 | |
251 | =item B<method_provider> |
252 | |
253 | =item B<has_method_provider> |
254 | |
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255 | =back |
256 | |
257 | =head1 BUGS |
258 | |
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259 | See L<Moose/BUGS> for details on reporting bugs. |
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260 | |
261 | =head1 AUTHOR |
262 | |
263 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
264 | |
265 | =head1 COPYRIGHT AND LICENSE |
266 | |
267 | Copyright 2007-2009 by Infinity Interactive, Inc. |
268 | |
269 | L<http://www.iinteractive.com> |
270 | |
271 | This library is free software; you can redistribute it and/or modify |
272 | it under the same terms as Perl itself. |
273 | |
274 | =cut |