Unable to use for comprehension to map over List within Future

Question

I have this issue that I have to work around every time. I can\'t map over something that is contained within a Future using a for comprehension.

Example:

Answer 1

I find this form more readable than either the serial map or the serial yield:

for (vs <- future(data);
     xs = for (x <- vs) yield g(x)
) yield xs

at the expense of the tupling map:

f.map((_, xs)).map(_._2)

or more precisely:

f.map((vs: List[Int]) => (vs, for (x <- vs) yield g(x))).map(_._2)