Module: Operable::Operations

Included in:
Operable
Defined in:
lib/operable/operations.rb

Instance Method Summary collapse

Instance Method Details

#*(by) ⇒ Object 



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# File 'lib/operable/operations.rb', line 42

def *(by)
  multiply_or_divide(:*, by)
end

#+(other) ⇒ Object 



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# File 'lib/operable/operations.rb', line 23

def +(other)
  add_or_subtract(:+, other)
end

#-(other) ⇒ Object 



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# File 'lib/operable/operations.rb', line 27

def -(other)
  add_or_subtract(:-, other)
end

#/(by) ⇒ Object 



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# File 'lib/operable/operations.rb', line 46

def /(by)
  multiply_or_divide(:/, by)
end

#add_or_subtract(method, other) ⇒ Object

Add or subtract one method from another

method - name of method to perform, as a symbol ( :+ or :- ) other - other object to operate with

Returns the resulting object



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# File 'lib/operable/operations.rb', line 10

def add_or_subtract(method, other)
  return self unless other

  self.class.new.tap do |o|
    operable_values.each do |k,v|
      our_value = v || 0
      other_value = other.respond_to?(k) ? other.send(k) : 0

      o.send("#{k}=", our_value.send(method, other_value || 0))
    end
  end
end

#matches?(other) ⇒ Boolean

Compare equality between objects

Returns true or false

Returns:

  • (Boolean) 


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# File 'lib/operable/operations.rb', line 53

def matches?(other)
  operable_values == other.operable_values
end

#multiply_or_divide(method, by) ⇒ Object

Multiply or divide values of this object by another

Returns a new object



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# File 'lib/operable/operations.rb', line 34

def multiply_or_divide(method, by)
  self.class.new.tap do |o|
    operable_values.each do |k,v|
      o.send("#{k}=", (v || 0).send(method, by))
    end
  end
end