Class: Proc

Inherits:
Object
  • Object
show all
Defined in:
lib/totally_lazy/either.rb,
lib/totally_lazy/option.rb,
lib/totally_lazy/functions.rb

Direct Known Subclasses

PredicateFunction

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.compose(f, g) ⇒ Object 



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# File 'lib/totally_lazy/functions.rb', line 5

def self.compose(f, g)
  lambda { |*args| f[g[*args]] }
end

Instance Method Details

#*(g) ⇒ Object 



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# File 'lib/totally_lazy/functions.rb', line 9

def *(g)
  Proc.compose(self, g)
end

#and_then(g) ⇒ Object 



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# File 'lib/totally_lazy/functions.rb', line 13

def and_then(g)
  Proc.compose(g, self)
end

#optional ⇒ Object 



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# File 'lib/totally_lazy/option.rb', line 4

def optional
  ->(value) {
    begin
      Option.option(self.(value))
    rescue
      Option.none
    end
  }
end

#or_exception ⇒ Object 



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# File 'lib/totally_lazy/either.rb', line 4

def or_exception
  -> (value) {
    begin
      right(self.(value))
    rescue Exception => e
      left(e)
    end
  }
end