Question

Is it possible to expand a map to a list of method arguments

In Python it is possible, eg.
Expanding tuples into arguments

I have a def map = ['a':1, 'b':2]
and a method def m(a,b)

I want to write smt like m(*map)

Answer 1

The spread operator (*) is used to tear a list apart into single elements. This can be used to invoke a method with multiple parameters and then spread a list into the values for the parameters.

List (lists in Groovy are closest related with tuples in Python^1,2):

list = [1, 2]
m(*list)

Map:

map = [a: 1, b: 2]
paramsList = map.values().toList()
m(*paramsList)

An importan point is that you pass the arguments by position.