Module: Aqueductron::Buildering

Included in:
Duct
Defined in:
lib/aqueductron/buildering.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.expand_function(expansion) ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 62

def expand_function(expansion)
  ->(piece, msg) do
    next_piece = Inlet.new(piece.destination, :not_done).flow(expansion.call(msg))
    Piece.new(next_piece, expand_function(expansion))
  end
end

.filter_function(predicate) ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 75

def filter_function(predicate)
  ->(piece, msg) do
    if(predicate.call(msg)) then
      piece.pass_on(msg, filter_function(predicate))
    else
      piece #don't change
    end
  end
end

.map_function(transform) ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 69

def map_function(transform)
  ->(piece, msg) do
    piece.pass_on(transform.call(msg), map_function(transform))
  end
end

.take_function(how_many) ⇒ Object

this will either return a Result or a Piece



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# File 'lib/aqueductron/buildering.rb', line 52

def take_function(how_many) # this will either return a Result or a Piece
  what_to_do = ->(piece, msg) do
    if (how_many == 0) then # this is a little inefficient. One extra piece of info will be read
      piece.send_eof
    else
      piece.pass_on(msg, take_function(how_many -1))
    end
  end
end

Instance Method Details

#answer(monoid) ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 11

def answer(monoid)
  answer_int(EndPiece.new(monoid))
end

#count ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 15

def count
  answer_int(CountingEndPiece.new)
end

#custom(piece) ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 31

def custom(piece)
   attach(piece)
end

#expand(transform) ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 35

def expand(transform)
  attach(expand_function(transform))
end

#keeping(predicate) ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 23

def keeping(predicate)
  attach(filter_function(predicate))
end

#last ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 47

def last
  answer_int(LastEndPiece.new)
end

#partition(categorize, make_new_path) ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 43

def partition(categorize, make_new_path)
  answer_int(SpontaneousJointPiece.new({}, categorize, make_new_path))
end

#split(paths) ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 39

def split(paths)
  answer_int(JointPiece.new(paths))
end

#take(how_many) ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 19

def take(how_many)
  attach(take_function(how_many))
end

#through(transform) ⇒ Object 



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# File 'lib/aqueductron/buildering.rb', line 27

def through(transform)
  attach(map_function(transform))
end