Module: CalculationHelper

Included in:
UnitManager::Unit
Defined in:
lib/util/calculation_helper.rb

Instance Method Summary collapse

Instance Method Details

#addition(split_equation:, index:) ⇒ Object 



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# File 'lib/util/calculation_helper.rb', line 51

def addition(split_equation:, index:)
  result = split_equation[index-1].to_f + split_equation[index+1].to_f
  split_equation.slice!(index, 2)
  split_equation[index-1] = result.to_s
end

#calculation_equation(split_equation:) ⇒ Object 



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# File 'lib/util/calculation_helper.rb', line 2

def calculation_equation(split_equation:)

  while split_equation.index('*').present? || split_equation.index('/').present? do
    multiplication_index = split_equation.index('*').presence || UnitManager::Unit::MAX_EQUATION_SIZE
    division_index = split_equation.index('/').presence || UnitManager::Unit::MAX_EQUATION_SIZE

    if multiplication_index <= division_index
      multiplication(split_equation: split_equation, index: multiplication_index)
      next
    end
    
    if division_index < multiplication_index
      division(split_equation: split_equation, index: division_index)
      next
    end
  end

  while split_equation.index('+').present? || split_equation.index('-').present? do
    addition_index = split_equation.index('+').presence || UnitManager::Unit::MAX_EQUATION_SIZE
    subtraction_index = split_equation.index('-').presence || UnitManager::Unit::MAX_EQUATION_SIZE

    if addition_index <= subtraction_index
      addition(split_equation: split_equation, index: addition_index)
      next
    end
    
    if subtraction_index < addition_index
      subtraction(split_equation: split_equation, index: subtraction_index)
      next
    end
  end

  result = split_equation[0]

  result.to_f.round
end

#division(split_equation:, index:) ⇒ Object 



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# File 'lib/util/calculation_helper.rb', line 45

def division(split_equation:, index:)
  result = split_equation[index-1].to_f / split_equation[index+1].to_f
  split_equation.slice!(index, 2)
  split_equation[index-1] = result.to_s
end

#multiplication(split_equation:, index:) ⇒ Object 



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# File 'lib/util/calculation_helper.rb', line 39

def multiplication(split_equation:, index:)
  result = split_equation[index-1].to_f * split_equation[index+1].to_f
  split_equation.slice!(index, 2)
  split_equation[index-1] = result.to_s
end

#subtraction(split_equation:, index:) ⇒ Object 



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# File 'lib/util/calculation_helper.rb', line 57

def subtraction(split_equation:, index:)
  result = split_equation[index-1].to_f - split_equation[index+1].to_f
  split_equation.slice!(index, 2)
  split_equation[index-1] = result.to_s
end