Class: Dry::Monads::Maybe

Inherits:
Object
  • Object
show all
Defined in:
lib/dry/monads/maybe.rb

Direct Known Subclasses

None, Some

Defined Under Namespace

Modules: Mixin Classes: None, Some

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.lift(value) ⇒ Object 



4
5
6
7
8
9
10
 
# File 'lib/dry/monads/maybe.rb', line 4

def self.lift(value)
  if value.nil?
    None.instance
  else
    Some.new(value)
  end
end

Instance Method Details

#==(other) ⇒ Object 



12
13
14
 
# File 'lib/dry/monads/maybe.rb', line 12

def ==(other)
  other.is_a?(Maybe) && value == other.value
end

#none? ⇒ Boolean

Returns:

  • (Boolean) 


16
17
18
 
# File 'lib/dry/monads/maybe.rb', line 16

def none?
  is_a?(None)
end

#some? ⇒ Boolean

Returns:

  • (Boolean) 


20
21
22
 
# File 'lib/dry/monads/maybe.rb', line 20

def some?
  is_a?(Some)
end