Module: None

Extended by:
None
Includes:
Option
Included in:
None
Defined in:
lib/optional/none.rb

Instance Method Summary collapse

Methods included from Option

[], #match

Methods included from Option::Enumerable

#detect, #flat_map, #flatten, #grep, #juxt, #map, #map_through, #reduce, #reject, #select, #to_ary

Instance Method Details

#&(other) ⇒ Object 



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# File 'lib/optional/none.rb', line 24

def & other
  self
end

#each ⇒ Object 



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# File 'lib/optional/none.rb', line 5

def each
end

#merge(other) ⇒ Object 



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# File 'lib/optional/none.rb', line 36

def merge other
  other
end

#none? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/optional/none.rb', line 8

def none?
  true
end

#some?(type = nil) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/optional/none.rb', line 12

def some?(type=nil)
  false
end

#to_s ⇒ Object 



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# File 'lib/optional/none.rb', line 32

def to_s
  "None"
end

#value ⇒ Object

Raises:



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# File 'lib/optional/none.rb', line 16

def value
  raise Option::ValueOfNoneError
end

#value_or(default = nil, &block) ⇒ Object 



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# File 'lib/optional/none.rb', line 20

def value_or(default=nil, &block)
  block.nil? ? default : block.call
end

#|(other) ⇒ Object 



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# File 'lib/optional/none.rb', line 28

def | other
  other
end