mod

func mod(x, y : Number) -> Number
  return x - y*div(x/y)

Modulus operator. For example:

  mod(1, 2) = 1
  mod(3, 2) = 1
  mod(-3, 2) = 1
  mod(3, -2) = -1
  mod(-3, -2) = -1
  mod(1, 0.5) = 0
  mod(3.5 2) = 1.5
  mod(3.5, 0.5) = 0