Splat operator
# Splat Operator (*)
# When calling methods
arguments = [1, 2, 3, 4]
my_method(*arguments) # any number of arguments
# or:
arguments = [2, 3, 4]
my_method(1, *arguments) # any number of trailing arguments
# or:
arguments = [1, 2]
my_method(*arguments, 3, 4) # any number of preceding arguments
# or:
arguments = [2, 3]
my_method(1, *arguments, 4) # any number of "in between" arguments
# All are equivalent to:
my_method(1, 2, 3, 4)
# Two splats (**) convert a hash into an arbitary number of keyword arguments
# This operator doesn't technically have a name
arguments = { first: 1, second: 2, third: 3 }
my_method(**arguments)
# or:
arguments = { first: 1, second: 2 }
my_method(third: 3, **arguments)
# Are equivalent to:
my_method(first:1, second:2, third:3)