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Question

How can we forbid creating rationals where denominator equals 0?


class Rational(n: Int, d: Int) {
  println("Created "+ n +"/"+ d)
}

Answer

Add preconditon using require method that throws an exception if it receives false:


class Rational(n: Int, d: Int) {
  require(d != 0)
  println("Created "+ n +"/"+ d)
}

Question

How can we forbid creating rationals where denominator equals 0?


class Rational(n: Int, d: Int) {
  println("Created "+ n +"/"+ d)
}

Answer

Question

How can we forbid creating rationals where denominator equals 0?


class Rational(n: Int, d: Int) {
  println("Created "+ n +"/"+ d)
}

Answer

Add preconditon using require method that throws an exception if it receives false:


class Rational(n: Int, d: Int) {
  require(d != 0)
  println("Created "+ n +"/"+ d)
}

status	not learned	measured difficulty	37% [default]	last interval [days]
repetition number in this series	0	memorised on		scheduled repetition
scheduled repetition interval		last repetition or drill

No repetitions

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