Module: Enumerable

Defined in:
lib/enumerable_mapper.rb

Defined Under Namespace

Classes: Mapper

Instance Method Summary collapse

Instance Method Details

#grouped_by(method_id = nil) ⇒ Object

Group collection according to the method name or block given.

Examples:

Person.find( :all ).grouped_by( :company )
Person.find( :all ).grouped_by{ |p| p.born_on.year }



28
29
30
31
32
 
# File 'lib/enumerable_mapper.rb', line 28

def grouped_by( method_id=nil )
	raise "No method or block given" unless method_id or block_given?
	groupings = self.map{ |i| ( block_given? ) ? yield( i ) : i.send( method_id ) }.uniq
	groupings.map{ |g| [ g, self.select{ |i| ( ( block_given? ) ? yield( i ) : i.send( method_id ) ) == g } ] }
end

#mapped ⇒ Object Also known as: collected

Returns a new mapper for the collection.



18
19
20
 
# File 'lib/enumerable_mapper.rb', line 18

def mapped
	Mapper.new( self )
end