Infinite streams in Scala

Question

Say I have a function, for example the old favourite

def factorial(n:Int) = (BigInt(1) /: (1 to n)) (_*_)

Now I want to find the biggest value

Answer 1

The following variant does not test the current, but the next integer, in order to find and return the last valid number:

Iterator.from(1).find(i => factorial(i+1) > Long.MaxValue).get

Using .get here is acceptable, since find on an infinite sequence will never return None.