Class: Unsound::Data::Just

Inherits:

Maybe

• Object
• Maybe
• Unsound::Data::Just

Defined in:

lib/unsound/data/maybe.rb

Instance Method Summary

• #>>(f = nil, &blk) ⇒ Data::Nothing, Data::Just (also: #and_then)

  Chain another operation which can result in a Maybe.

• #fmap(f = nil, &blk) ⇒ Data::Just

  Apply a function to a value contained in a Just.

• #maybe(f, _) ⇒ Object

  Call a function on the value in the Just.

• #or_else ⇒ Data::Just

  A Noop.

Methods inherited from Maybe

of

Instance Method Details

#>>(f = nil, &blk) ⇒ Data::Nothing, Data::Just Also known as: and_then

Chain another operation which can result in a Maybe

Parameters:

• f (#call) (defaults to: nil) —

  the next operation

Returns:

• (Data::Nothing, Data::Just)

# File 'lib/unsound/data/maybe.rb', line 83

def >>(f = nil, &blk)
  (f || blk)[value]
end

#fmap(f = nil, &blk) ⇒ Data::Just

Apply a function to a value contained in a Unsound::Data::Just

Parameters:

• f (#call) (defaults to: nil) —

  the function to apply

Returns:

• (Data::Just) —

  the result of applying the function wrapped in a Unsound::Data::Just

# File 'lib/unsound/data/maybe.rb', line 75

def fmap(f = nil, &blk)
  self >> Composition.compose(method(:of), (f || blk))
end

#maybe(f, _) ⇒ Object

Call a function on the value in the Unsound::Data::Just

Parameters:

• f (#call) —

  a function capable of processing the value

• _ (#call) —

  a function that will never be called

# File 'lib/unsound/data/maybe.rb', line 99

def maybe(f, _)
  f[value]
end

#or_else ⇒ Data::Just

A Noop

Returns:

• (Data::Just)

# File 'lib/unsound/data/maybe.rb', line 91

def or_else(*)
  self
end