Class: Simulation

Inherits:
Object
  • Object
show all
Extended by:
PRNG
Includes:
Monad
Defined in:
lib/do_notation/monads/simulations.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from PRNG

next_state

Methods included from Monad

#>>, #bind_const, included, #joinM, #reflect_that_doesnt_work

Constructor Details

#initialize(&b) ⇒ Simulation

Returns a new instance of Simulation.



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# File 'lib/do_notation/monads/simulations.rb', line 15

def initialize(&b)
  @f = b
end

Instance Attribute Details

#f ⇒ Object (readonly)

Returns the value of attribute f.



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# File 'lib/do_notation/monads/simulations.rb', line 13

def f
  @f
end

Class Method Details

.rand(n) ⇒ Object 



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# File 'lib/do_notation/monads/simulations.rb', line 23

def self.rand(n)
  self.new do |s|
    [s.abs % n, next_state(s)]
  end
end

.unit(x) ⇒ Object 



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# File 'lib/do_notation/monads/simulations.rb', line 19

def self.unit(x)
  new { |s| [x, s] }
end

Instance Method Details

#bind(&b) ⇒ Object 



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# File 'lib/do_notation/monads/simulations.rb', line 29

def bind(&b)
  self.class.new do |s|
    x, s = @f.call(s)
    b.call(x).f.call(s)
  end
end

#play(s = 12345) ⇒ Object 



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# File 'lib/do_notation/monads/simulations.rb', line 36

def play(s = 12345)
  @f.call(s).first
end