Module: Functions

Defined in:
lib/functions.rb

Instance Method Summary collapse

Instance Method Details

#as_promise ⇒ Object 



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# File 'lib/functions.rb', line 50

def as_promise
  -> (fn) {
    Concurrent::Promise.new { fn.() }
  }
end

#call ⇒ Object 



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# File 'lib/functions.rb', line 17

def call
  ->(fn) { fn.() }
end

#call_concurrently(sequence_of_fn) ⇒ Object 



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# File 'lib/functions.rb', line 33

def call_concurrently(sequence_of_fn)
  pool = Concurrent::CachedThreadPool.new
  begin
    call_concurrently_with_pool(sequence_of_fn, pool)
  ensure
    pool.shutdown
  end
end

#call_concurrently_with_pool(sequence_of_fn, pool) ⇒ Object 



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# File 'lib/functions.rb', line 42

def call_concurrently_with_pool(sequence_of_fn, pool)
  sequence_of_fn.
      map(as_promise).
      map(execute_with(pool)).
      realise.
      map(realise_promise)
end

#call_raises(e) ⇒ Object 



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

def call_raises(e)
  -> { raise e }
end

#defer_apply(fn, value) ⇒ Object 



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# File 'lib/functions.rb', line 29

def defer_apply(fn, value)
  ->() { fn.(value) }
end

#defer_return(fn) ⇒ Object 



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# File 'lib/functions.rb', line 25

def defer_return(fn)
  ->(value) { defer_apply(fn, value) }
end

#execute_with(pool) ⇒ Object 



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# File 'lib/functions.rb', line 56

def execute_with(pool)
  -> (promise) {
    pool.post { promise.execute }
    promise
  }
end

#flip(fn) ⇒ Object 



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# File 'lib/functions.rb', line 21

def flip(fn)
  ->(a, b) { fn.(b, a) }
end

#identity ⇒ Object 



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

def identity
  -> (a) { a }
end

#realise_promise ⇒ Object 



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# File 'lib/functions.rb', line 63

def realise_promise
  ->(promise) { promise.value! }
end

#returns(value) ⇒ Object 



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

def returns(value)
  -> { value }
end