Class: Fear::Left

Inherits:
Object
  • Object
show all
Includes:
Either
Defined in:
lib/fear/left.rb

Constant Summary collapse

EXTRACTOR = 
proc do |either|
  if Fear::Left === either
    Fear.some([either.left_value])
  else
    Fear.none
  end
end

Instance Method Summary collapse

Methods included from Either

#==, #any?, #each, #flat_map, #get_or_else, #include?, #initialize, #inspect, #map, #match, matcher, #or_else, #to_option

Instance Method Details

#===(other) ⇒ Boolean

Used in case statement

Parameters:

  • other (any)

Returns:

  • (Boolean) 


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# File 'lib/fear/left.rb', line 74

def ===(other)
  if other.is_a?(Left)
    value === other.value
  else
    super
  end
end

#join_left ⇒ Either

Returns:

Raises:

  • (TypeError) 


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# File 'lib/fear/left.rb', line 65

def join_left
  value.tap do |v|
    Utils.assert_type!(v, Either)
  end
end

#join_right ⇒ self

Returns:

  • (self) 


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# File 'lib/fear/left.rb', line 59

def join_right
  self
end

#left? ⇒ true Also known as: failure?

Returns:

  • (true) 


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# File 'lib/fear/left.rb', line 27

def left?
  true
end

#left_value ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/fear/left.rb', line 16

def left_value
  value
end

#reduce(reduce_left, _reduce_right) ⇒ any

Parameters:

  • reduce_left (Proc)

Returns:

  • (any) 


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# File 'lib/fear/left.rb', line 54

def reduce(reduce_left, _reduce_right)
  reduce_left.call(value)
end

#reject ⇒ Left

Returns:



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# File 'lib/fear/left.rb', line 43

def reject
  self
end

#right? ⇒ false Also known as: success?

Returns:

  • (false) 


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# File 'lib/fear/left.rb', line 21

def right?
  false
end

#select ⇒ Left

Returns:



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# File 'lib/fear/left.rb', line 38

def select
  self
end

#select_or_else ⇒ Either

Returns:



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# File 'lib/fear/left.rb', line 33

def select_or_else(*)
  self
end

#swap ⇒ Right

Returns value in ‘Right`.

Returns:

  • (Right) —

    value in ‘Right`



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# File 'lib/fear/left.rb', line 48

def swap
  Right.new(value)
end