package Moose::Meta::Attribute::Native::Trait::Array;
use Moose::Role;
-our $VERSION = '0.87';
+our $VERSION = '1.09';
$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
=head1 NAME
-Moose::Meta::Attribute::Native::Trait::Array
+Moose::Meta::Attribute::Native::Trait::Array - Helper trait for ArrayRef attributes
=head1 SYNOPSIS
is => 'ro',
isa => 'ArrayRef[Str]',
default => sub { [] },
- handles => {
- all_options => 'elements',
- map_options => 'map',
- filter_options => 'grep',
- find_option => 'find',
- first_option => 'first',
- last_option => 'last',
- get_option => 'get',
- join_options => 'join',
- count_options => 'count',
- do_i_have_options => 'empty',
- sorted_options => 'sort',
- }
+ 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 module provides an Array attribute which provides a number of
-array operations.
+array operations.
=head1 PROVIDED METHODS
my $count = $stuff->count_options;
print "$count\n"; # prints 4
-=item B<empty>
+=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";
+
+=item B<elements>
+
+Returns all of the elements of the array.
+
+ my @option = $stuff->all_options;
+ print "@options\n"; # prints "foo bar baz boo"
+
+=item B<get($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"
+
+=item B<pop>
+
+=item B<push($value1, $value2, value3 ...)>
+
+=item B<shift>
+
+=item B<unshift($value1, $value2, value3 ...)>
-If the array is populated, returns true. Otherwise, returns false.
+=item B<splice($offset, $length, @values)>
- $stuff->do_i_have_options ? print "Good boy.\n" : die "No options!\n" ;
+These methods are all equivalent to the Perl core functions of the same name.
-=item B<find>
+=item B<first( sub { ... } )>
-This method accepts a subroutine reference as its argument. That sub
-will receive each element of the array in turn. If it returns true for
-an element, that element will be returned by the C<find> method.
+This method returns the first item 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 reference will be called against each
+element in the array until one matches or all elements have been checked.
- my $found = $stuff->find_option( sub { $_[0] =~ /^b/ } );
+ my $found = $stuff->find_option( sub { /^b/ } );
print "$found\n"; # prints "bar"
-=item B<grep>
+=item B<grep( sub { ... } )>
-This method accepts a subroutine reference as its argument. This
-method returns every element for which that subroutine reference
-returns a true value.
+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.
- my @found = $stuff->filter_options( sub { $_[0] =~ /^b/ } );
+ my @found = $stuff->filter_options( sub { /^b/ } );
print "@found\n"; # prints "bar baz boo"
-=item B<map>
+=item B<map( sub { ... } )>
-This method accepts a subroutine reference as its argument. The
-subroutine will be executed for each element of the array. It is
-expected to return a modified version of that element. The return
-value of the method is a list of the modified options.
+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.
- my @mod_options = $stuff->map_options( sub { $_[0] . "-tag" } );
+ my @mod_options = $stuff->map_options( sub { $_ . "-tag" } );
print "@mod_options\n"; # prints "foo-tag bar-tag baz-tag boo-tag"
-=item B<sort>
+=item B<reduce( sub { ... } )>
+
+This method condenses 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.
-Sorts and returns the elements of the array.
+ my $found = $stuff->reduce_options( sub { $_[0] . $_[1] } );
+ print "$found\n"; # prints "foobarbazboo"
-You can provide an optional subroutine reference to sort with (as you
-can with the core C<sort> function). However, instead of using C<$a>
-and C<$b>, you will need to use C<$_[0]> and C<$_[1]> instead.
+=item B<sort( sub { ... } )>
+
+Returns a the array in sorted order.
+
+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.
# ascending ASCIIbetical
my @sorted = $stuff->sort_options();
my @sorted_options = $stuff->sort_options( sub { lc $_[1] cmp lc $_[0] } );
print "@sorted_options\n"; # prints "foo boo baz bar"
-=item B<elements>
-
-Returns all of the elements of the array
-
- my @option = $stuff->all_options;
- print "@options\n"; # prints "foo bar baz boo"
-
-=item B<join>
-
-Joins every element of the array using the separator given as argument.
+=item B<sort_in_place>
- my $joined = $stuff->join_options( ':' );
- print "$joined\n"; # prints "foo:bar:baz:boo"
+Sorts the array I<in place>, modifying the value of the attribute.
-=item B<get>
+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.
-Returns an element of the array by its index.
+=item B<shuffle>
- my $option = $stuff->get_option(1);
- print "$option\n"; # prints "bar"
+Returns the array, with indices in random order, like C<shuffle> from
+L<List::Util>.
-=item B<first>
+=item B<uniq>
-Returns the first element of the array.
+Returns the array, with all duplicate elements removed, like C<uniq> from
+L<List::MoreUtils>.
- my $first = $stuff->first_option;
- print "$first\n"; # prints "foo"
+=item B<join($str)>
-=item B<last>
+Joins every element of the array using the separator given as argument, just
+like Perl's core C<join> function.
-Returns the last element of the array.
+ my $joined = $stuff->join_options( ':' );
+ print "$joined\n"; # prints "foo:bar:baz:boo"
- my $last = $stuff->last_option;
- print "$last\n"; # prints "boo"
+=item B<set($index, $value)>
-=item B<pop>
+Given an index and a value, sets the specified array element's value.
-=item B<push>
+=item B<delete($index)>
-=item B<set>
+Removes the element at the given index from the array.
-=item B<shift>
+=item B<insert($index, $value)>
-=item B<unshift>
+Inserts a new element into the array at the given index.
=item B<clear>
-=item B<delete>
-
-=item B<insert>
-
-=item B<splice>
+Empties the entire array, like C<@array = ()>.
-=item B<sort_in_place>
-
-Sorts the array I<in place>, modifying the value of the attribute.
+=item B<accessor>
-You can provide an optional subroutine reference to sort with (as you
-can with the core C<sort> function). However, instead of using C<$a>
-and C<$b>, you will need to use C<$_[0]> and C<$_[1]> instead.
+This method provides a get/set accessor for the array, based on array indexes.
+If passed one argument, it returns the value at the specified index. If
+passed two arguments, it sets the value of the specified index.
-=item B<accessor>
+=item B<natatime($n, $code)>
-If passed one argument, returns the value of the requested element.
-If passed two arguments, sets the value of the requested element.
+This method returns an iterator which, on each call, returns C<$n> more items
+from the array, in order, like C<natatime> from L<List::MoreUtils>. A coderef
+can optionally be provided; it will be called on each group of C<$n> elements
+in the array.
=back
=head1 BUGS
-All complex software has bugs lurking in it, and this module is no
-exception. If you find a bug please either email me, or add the bug
-to cpan-RT.
+See L<Moose/BUGS> for details on reporting bugs.
=head1 AUTHOR
projects / gitmo/Moose.git / blobdiff