Interview Question for SDETs

Country: India
Interview Type: In-Person

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Change calculate to reverse-polish notation:

calculate (operator, operand, operand, ...)

define an operator as an interface which exposes a #doOperation(operand...) method.

Operator.doOperation takes responsibility to ensure the correct # of operands are present and do the particular operation so

function calculate(operand) {
  var operators = [], 1)
  return operand.doOperation(operators)

And whala, no matter how many operators your calculator supports, the code never changes.

- srterpe March 22, 2017 | Flag Reply

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