diff options
author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2015-06-06 17:50:16 +0000 |
---|---|---|
committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2015-06-06 17:50:16 +0000 |
commit | 5ac2026f7eed78958d69d051e7a8e993dcf51205 (patch) | |
tree | 298c3d2f08bdfe5689998b11892d72a897985be1 /lib/Moose/Meta/Attribute/Native/Trait/Array.pm | |
download | Moose-tarball-5ac2026f7eed78958d69d051e7a8e993dcf51205.tar.gz |
Moose-2.1405HEADMoose-2.1405master
Diffstat (limited to 'lib/Moose/Meta/Attribute/Native/Trait/Array.pm')
-rw-r--r-- | lib/Moose/Meta/Attribute/Native/Trait/Array.pm | 384 |
1 files changed, 384 insertions, 0 deletions
diff --git a/lib/Moose/Meta/Attribute/Native/Trait/Array.pm b/lib/Moose/Meta/Attribute/Native/Trait/Array.pm new file mode 100644 index 0000000..3d33b08 --- /dev/null +++ b/lib/Moose/Meta/Attribute/Native/Trait/Array.pm @@ -0,0 +1,384 @@ +package Moose::Meta::Attribute::Native::Trait::Array; +our $VERSION = '2.1405'; + +use Moose::Role; +with 'Moose::Meta::Attribute::Native::Trait'; + +sub _helper_type { 'ArrayRef' } + +no Moose::Role; + +1; + +# ABSTRACT: Helper trait for ArrayRef attributes + +__END__ + +=pod + +=encoding UTF-8 + +=head1 NAME + +Moose::Meta::Attribute::Native::Trait::Array - Helper trait for ArrayRef attributes + +=head1 VERSION + +version 2.1405 + +=head1 SYNOPSIS + + package Stuff; + use Moose; + + has 'options' => ( + traits => ['Array'], + is => 'ro', + isa => 'ArrayRef[Str]', + default => sub { [] }, + handles => { + all_options => 'elements', + add_option => 'push', + map_options => 'map', + filter_options => 'grep', + find_option => 'first', + get_option => 'get', + join_options => 'join', + count_options => 'count', + has_options => 'count', + has_no_options => 'is_empty', + sorted_options => 'sort', + }, + ); + + no Moose; + 1; + +=head1 DESCRIPTION + +This trait provides native delegation methods for array references. + +=head1 DEFAULT TYPE + +If you don't provide an C<isa> value for your attribute, it will default to +C<ArrayRef>. + +=head1 PROVIDED METHODS + +=over 4 + +=item * B<count> + +Returns the number of elements in the array. + + $stuff = Stuff->new; + $stuff->options( [ "foo", "bar", "baz", "boo" ] ); + + print $stuff->count_options; # prints 4 + +This method does not accept any arguments. + +=item * B<is_empty> + +Returns a boolean value that is true when the array has no elements. + + $stuff->has_no_options ? die "No options!\n" : print "Good boy.\n"; + +This method does not accept any arguments. + +=item * B<elements> + +Returns all of the elements of the array as an array (not an array reference). + + my @option = $stuff->all_options; + print "@options\n"; # prints "foo bar baz boo" + +This method does not accept any arguments. + +=item * B<get($index)> + +Returns an element of the array by its index. You can also use negative index +numbers, just as with Perl's core array handling. + + my $option = $stuff->get_option(1); + print "$option\n"; # prints "bar" + +If the specified element does not exist, this will return C<undef>. + +This method accepts just one argument. + +=item * B<pop> + +Just like Perl's builtin C<pop>. + +This method does not accept any arguments. + +=item * B<push($value1, $value2, value3 ...)> + +Just like Perl's builtin C<push>. Returns the number of elements in the new +array. + +This method accepts any number of arguments. + +=item * B<shift> + +Just like Perl's builtin C<shift>. + +This method does not accept any arguments. + +=item * B<unshift($value1, $value2, value3 ...)> + +Just like Perl's builtin C<unshift>. Returns the number of elements in the new +array. + +This method accepts any number of arguments. + +=item * B<splice($offset, $length, @values)> + +Just like Perl's builtin C<splice>. In scalar context, this returns the last +element removed, or C<undef> if no elements were removed. In list context, +this returns all the elements removed from the array. + +This method requires at least one argument. + +=item * B<first( sub { ... } )> + +This method returns the first matching item in the array, just like +L<List::Util>'s C<first> function. The matching is done with a subroutine +reference you pass to this method. The subroutine will be called against each +element in the array until one matches or all elements have been checked. +Each list element will be available to the sub in C<$_>. + + my $found = $stuff->find_option( sub {/^b/} ); + print "$found\n"; # prints "bar" + +This method requires a single argument. + +=item * B<first_index( sub { ... } )> + +This method returns the index of the first matching item in the array, just +like L<List::MoreUtils>'s C<first_index> function. The matching is done with a +subroutine reference you pass to this method. The subroutine will be called +against each element in the array until one matches or all elements have been +checked. Each list element will be available to the sub in C<$_>. + +This method requires a single argument. + +=item * B<grep( sub { ... } )> + +This method returns every element matching a given criteria, just like Perl's +core C<grep> function. This method requires a subroutine which implements the +matching logic; each list element will be available to the sub in C<$_>. + + my @found = $stuff->filter_options( sub {/^b/} ); + print "@found\n"; # prints "bar baz boo" + +This method requires a single argument. + +=item * B<map( sub { ... } )> + +This method transforms every element in the array and returns a new array, +just like Perl's core C<map> function. This method requires a subroutine which +implements the transformation; each list element will be available to the sub +in C<$_>. + + my @mod_options = $stuff->map_options( sub { $_ . "-tag" } ); + print "@mod_options\n"; # prints "foo-tag bar-tag baz-tag boo-tag" + +This method requires a single argument. + +=item * B<reduce( sub { ... } )> + +This method turns an array into a single value, by passing a function the +value so far and the next value in the array, just like L<List::Util>'s +C<reduce> function. The reducing is done with a subroutine reference you pass +to this method; each list element will be available to the sub in C<$_>. + + my $found = $stuff->reduce_options( sub { $_[0] . $_[1] } ); + print "$found\n"; # prints "foobarbazboo" + +This method requires a single argument. + +=item * B<sort> + +=item * B<sort( sub { ... } )> + +Returns the elements of the array (not an array reference) in sorted order, +or, like C<elements>, returns the number of elements in the array in scalar context. + +You can provide an optional subroutine reference to sort with (as you can with +Perl's core C<sort> function). However, instead of using C<$a> and C<$b> in +this subroutine, you will need to use C<$_[0]> and C<$_[1]>. + + # ascending ASCIIbetical + my @sorted = $stuff->sort_options(); + + # Descending alphabetical order + my @sorted_options = $stuff->sort_options( sub { lc $_[1] cmp lc $_[0] } ); + print "@sorted_options\n"; # prints "foo boo baz bar" + +This method accepts a single argument. + +=item * B<sort_in_place> + +=item * B<sort_in_place( sub { ... } )> + +Sorts the array I<in place>, modifying the value of the attribute. + +You can provide an optional subroutine reference to sort with (as you can with +Perl's core C<sort> function). However, instead of using C<$a> and C<$b>, you +will need to use C<$_[0]> and C<$_[1]> instead. + +This method does not define a return value. + +This method accepts a single argument. + +=item * B<shuffle> + +Returns the elements of the array in random order, like C<shuffle> from +L<List::Util>. + +This method does not accept any arguments. + +=item * B<uniq> + +Returns the array with all duplicate elements removed, like C<uniq> from +L<List::MoreUtils>. + +This method does not accept any arguments. + +=item * B<join($str)> + +Joins every element of the array using the separator given as argument, just +like Perl's core C<join> function. + + my $joined = $stuff->join_options(':'); + print "$joined\n"; # prints "foo:bar:baz:boo" + +This method requires a single argument. + +=item * B<set($index, $value)> + +Given an index and a value, sets the specified array element's value. + +This method returns the value at C<$index> after the set. + +This method requires two arguments. + +=item * B<delete($index)> + +Removes the element at the given index from the array. + +This method returns the deleted value. Note that if no value exists, it will +return C<undef>. + +This method requires one argument. + +=item * B<insert($index, $value)> + +Inserts a new element into the array at the given index. + +This method returns the new value at C<$index>. + +This method requires two arguments. + +=item * B<clear> + +Empties the entire array, like C<@array = ()>. + +This method does not define a return value. + +This method does not accept any arguments. + +=item * B<accessor($index)> + +=item * B<accessor($index, $value)> + +This method provides a get/set accessor for the array, based on array indexes. +If passed one argument, it returns the value at the specified index. If +passed two arguments, it sets the value of the specified index. + +When called as a setter, this method returns the new value at C<$index>. + +This method accepts one or two arguments. + +=item * B<natatime($n)> + +=item * B<natatime($n, $code)> + +This method returns an iterator which, on each call, returns C<$n> more items +from the array, in order, like C<natatime> from L<List::MoreUtils>. + +If you pass a coderef as the second argument, then this code ref will be +called on each group of C<$n> elements in the array until the array is +exhausted. + +This method accepts one or two arguments. + +=item * B<shallow_clone> + +This method returns a shallow clone of the array reference. The return value +is a reference to a new array with the same elements. It is I<shallow> +because any elements that were references in the original will be the I<same> +references in the clone. + +=back + +=head1 BUGS + +See L<Moose/BUGS> for details on reporting bugs. + +=head1 AUTHORS + +=over 4 + +=item * + +Stevan Little <stevan.little@iinteractive.com> + +=item * + +Dave Rolsky <autarch@urth.org> + +=item * + +Jesse Luehrs <doy@tozt.net> + +=item * + +Shawn M Moore <code@sartak.org> + +=item * + +יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org> + +=item * + +Karen Etheridge <ether@cpan.org> + +=item * + +Florian Ragwitz <rafl@debian.org> + +=item * + +Hans Dieter Pearcey <hdp@weftsoar.net> + +=item * + +Chris Prather <chris@prather.org> + +=item * + +Matt S Trout <mst@shadowcat.co.uk> + +=back + +=head1 COPYRIGHT AND LICENSE + +This software is copyright (c) 2006 by Infinity Interactive, Inc.. + +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 |