Class::MakeMethods::Basic::Array - Basic array methods

       The Basic::Array subclass of MakeMethods provides a basic constructor and accessors for blessed-array
       object instances.

   CallingConventions
       When you "use" this package, the method names you provide as arguments cause subroutines to be generated
       and installed in your module.

       See "Calling Conventions" in Class::MakeMethods::Basic for a summary, or "USAGE" in Class::MakeMethods
       for full details.

   DeclarationSyntax
       To declare methods, pass in pairs of a method-type name followed by one or more method names. Valid
       method-type names for this package are listed in "METHOD GENERATOR TYPES".

       See "Declaration Syntax" in Class::MakeMethods::Basic for more syntax information.

   AboutPositionalAccessors
       Each accessor method claims the next available spot in the array to store its value in.

       The mapping between method names and array positions is stored in a hash named %FIELDS in the target
       package. When the first positional accessor is defined for a package, its %FIELDS are initialized by
       searching its inheritance tree.

       Caution: Subclassing packages that use positional accessors is somewhat fragile, since you may end up
       with two distinct methods assigned to the same position. Specific cases to avoid are:

       •   If you inherit from more than one class with positional accessors, the positions used by the two sets
           of methods will overlap.

       •   If  your  superclass  adds  additional  positional  accessors after you declare your first, they will
           overlap yours.

new-Constructor
       For each method name passed, returns a subroutine with the following characteristics:

       •   If called as a class method, makes a new array and blesses it into that class.

       •   If called on an array-based instance, makes a copy of it and blesses the copy into the same class  as
           the original instance.

       •   If  passed  a  list  of  method-value  pairs, calls each named method with the associated value as an
           argument.

       •   Returns the new instance.

       Sample declaration and usage:

         package MyObject;
         use Class::MakeMethods::Basic::Array (
           new => 'new',
         );
         ...

         # Bare constructor
         my $empty = MyObject->new();

         # Constructor with initial sequence of method calls
         my $obj = MyObject->new( foo => 'Foozle', bar => 'Barbados' );

         # Copy with overriding sequence of method calls
         my $copy = $obj->new( bar => 'Bob' );

   scalar-InstanceAccessor
       For each method name passed, uses a closure to generate a subroutine with the following characteristics:

       •   Must be called on an array-based instance.

       •   Determines the array position associated with the method name, and uses that as an  index  into  each
           instance to access the related value.

       •   If called without any arguments returns the current value (or undef).

       •   If called with an argument, stores that as the value, and returns it,

       Sample declaration and usage:

         package MyObject;
         use Class::MakeMethods::Basic::Array (
           scalar => 'foo',
         );
         ...

         # Store value
         $obj->foo('Foozle');

         # Retrieve value
         print $obj->foo;

   array-InstanceRefAccessor
       For each method name passed, uses a closure to generate a subroutine with the following characteristics:

       •   Must be called on an array-based instance.

       •   Determines  the  array  position associated with the method name, and uses that as an index into each
           instance to access the related value.

       •   The value for each instance will be a reference to an array (or undef).

       •   If called without any arguments, returns the current array-ref value (or undef).

       •   If called with one argument, uses that argument as an index to retrieve from  the  referenced  array,
           and  returns  that  value  (or  undef).  If  the single argument is an array ref, then a slice of the
           referenced array is returned.

       •   If called with a list of index-value pairs, stores the value at the given  index  in  the  referenced
           array.  If  the  instance's  value was previously undefined, a new array is autovivified. The current
           value in each position will be overwritten, and later arguments with the  same  index  will  override
           earlier ones. Returns the current array-ref value.

       Sample declaration and usage:

         package MyObject;
         use Class::MakeMethods::Basic::Array (
           array => 'bar',
         );
         ...

         # Set values by position
         $obj->bar(0 => 'Foozle', 1 => 'Bang!');

         # Positions may be overwritten, and in any order
         $obj->bar(2 => 'And Mash', 1 => 'Blah!');

         # Retrieve value by position
         print $obj->bar(1);

         # Retrieve slice of values by position
         print join(', ', $obj->bar( [0, 2] ) );

         # Direct access to referenced array
         print scalar @{ $obj->bar() };

         # Reset the array contents to empty
         @{ $obj->bar() } = ();

   hash-InstanceRefAccessor
       For each method name passed, uses a closure to generate a subroutine with the following characteristics:

       •   Must be called on an array-based instance.

       •   Determines  the  array  position associated with the method name, and uses that as an index into each
           instance to access the related value.

       •   The value for each instance will be a reference to a hash (or undef).

       •   If called without any arguments, returns the current hash-ref value (or undef).

       •   If called with one argument, uses that argument as an index to retrieve from the referenced hash, and
           returns that value (or undef). If the single argument is an array ref, then a slice of the referenced
           hash is returned.

       •   If called with a list of key-value pairs, stores the value under the  given  key  in  the  referenced
           hash. If the instance's value was previously undefined, a new hash is autovivified. The current value
           under each key will be overwritten, and later arguments with the same key will override earlier ones.
           Returns the current hash-ref value.

       Sample declaration and usage:

         package MyObject;
         use Class::MakeMethods::Basic::Array (
           hash => 'baz',
         );
         ...

         # Set values by key
         $obj->baz('foo' => 'Foozle', 'bar' => 'Bang!');

         # Values may be overwritten, and in any order
         $obj->baz('broccoli' => 'Blah!', 'foo' => 'Fiddle');

         # Retrieve value by key
         print $obj->baz('foo');

         # Retrieve slice of values by position
         print join(', ', $obj->baz( ['foo', 'bar'] ) );

         # Direct access to referenced hash
         print keys %{ $obj->baz() };

         # Reset the hash contents to empty
         @{ $obj->baz() } = ();

       Class::MakeMethods::Basic::Array - Basic array methods

       See Class::MakeMethods for general information about this distribution.

       See Class::MakeMethods::Basic for more about this family of subclasses.

perl v5.36.0                                       2022-10-13                     MakeMethods::Basic::Array(3pm)

         package MyObject;
         use Class::MakeMethods::Basic::Array (
           new => 'new',
           scalar => [ 'foo', 'bar' ],
           array => 'my_list',
           hash => 'my_index',
         );
         ...

         # Constructor
         my $obj = MyObject->new( foo => 'Foozle' );

         # Scalar Accessor
         print $obj->foo();

         $obj->bar('Barbados');
         print $obj->bar();

         # Array accessor
         $obj->my_list(0 => 'Foozle', 1 => 'Bang!');
         print $obj->my_list(1);

         # Hash accessor
         $obj->my_index('broccoli' => 'Blah!', 'foo' => 'Fiddle');
         print $obj->my_index('foo');