Question

I have the following map Map(FULL -> 3854.0, REMAINING -> 3769.0)
I would like to compute the two values such that the (FULL/REMAINING)*100
Is there an good way to do this? I tried m.foldLeft(0)(_/_._2) but the compilier is complaining about a type mismatch between float and Int?

Answer 1

You can fix the type mismatch by specifying 0.0 as the first argument to foldLeft, but that won’t make your code right. It will then compute 0.0/3854.0/3769.0 which equals 0.0.

In fact, Map(FULL -> 3854.0, REMAINING -> 3769.0) is not guaranteed to be ordered, so I’m pretty sure the best you can do is m('FULL') / m('REMAINING').

Perhaps you want to create a case class for this instead, in which case you could just say m.full/m.remaining or even make a method to compute that automatically.