Question

I must generate some random numbers and sum them. Something like

result = generateList(range(0, max), generatorFunctionReturningInt()).foreach(sum _)

If generateList generates a List with size = max and values generated by generatorFunctionReturningInt

Or may be something like

result = range(0, max).map(generatorFunctionReturningInt).foreach(sum _)

Answer 1

Simply

(0 to max).map(_ => (new util.Random).nextInt(max)).sum

where max defines both number of numbers and random range.

foreach method intended to be used with side-effect functions (like println) which returns nothing (Unit).