Question

In Scala I can write something like this:

val a = List(1, 2, 3)
val b = List(4, 5)
println(a zip b)

That would produce List((1,4), (2,5)) as output.
Now I have two collections in Groovy and want to zip them in similar fashion. What is the simplest way to do this?

Answer 1

Groovy’s equivalent of Scala’s zip is List#transpose, which can be called on a list of lists:

assert [[1, 2, 3], [4, 5]].transpose() == [[1, 4], [2, 5]]