Ruby Language Splat operator (*) Coercing arrays into parameter list
Example
Suppose you had an array:
pair = ['Jack','Jill']
And a method that takes two arguments:
def print_pair (a, b)
puts "#{a} and #{b} are a good couple!"
end
You might think you could just pass the array:
print_pair(pair) # wrong number of arguments (1 for 2) (ArgumentError)
Since the array is just one argument, not two, so Ruby throws an exception. You could pull out each element individually:
print_pair(pair[0], pair[1])
Or you can use the splat operator to save yourself some effort:
print_pair(*pair)
