zipWith (mapping over multiple Seq) in Scala

Question

Suppose I have

val foo : Seq[Double] = ...
val bar : Seq[Double] = ...

and I wish to produce a seq where the baz(i) = foo(i) + bar(i). One

Answer 1

In Scala 2.8:

val baz = (foo, bar).zipped map (_ + _)

And it works for more than two operands in the same way. I.e. you could then follow this up with:

(foo, bar, baz).zipped map (_ * _ * _)