Class: Mathy::Operations::Operation

Inherits:
Object
  • Object
show all
Defined in:
lib/mathy/operations/operation.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(difficulty, key, verification) ⇒ Operation

Returns a new instance of Operation.


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# File 'lib/mathy/operations/operation.rb', line 6

def initialize(difficulty, key, verification)
  @difficulty = difficulty
  @key = key
  @verifier = verification
end

Instance Attribute Details

#key ⇒ Object (readonly)

Returns the value of attribute key.


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# File 'lib/mathy/operations/operation.rb', line 4

def key
  @key
end

Instance Method Details

#calculate(operands) ⇒ Object 


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# File 'lib/mathy/operations/operation.rb', line 21

def calculate(operands)
  operands.inject { |result, x| result.send(key.to_sym, x) }
end

#matches?(other_key) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/mathy/operations/operation.rb', line 17

def matches?(other_key)
  key == other_key
end

#play_turn ⇒ Object 


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# File 'lib/mathy/operations/operation.rb', line 12

def play_turn
  operands = @difficulty.next_operands
  @verifier.check_answer("#{operands.join(" #{key} ")} = ", calculate(operands))
end