splat operator in groovy?

Question

def foo(map, name) {
  println(map)
}

foo("bar", hi: "bye")

will print

[hi:bye]

Now I have a previous map that I wish to pass along to foo. In pseudo code, something like:

def otherMap = [hi: "world"]
foo("bar", hi: "bye", otherMap*)

So that it prints

[hi:world]

This doesn't work of course.

Also, trying to pass just the map mixes the order of arguments:

def otherMap = [hi: "world"]
foo("bar", otherMap)

will print

bar

How can I fix this?

Answer 1

You're looking for the spread-map operator.

def foo(map, name) {
  println(map)
}

foo("bar", hi: "bye")

def otherMap = [hi: "world"]
foo("bar", hi: "bye", *:otherMap)
foo("bar", *:otherMap, hi: "bye")

prints:

["hi":"bye"]
["hi":"world"]
["hi":"bye"]