In Partial Application, we create a lambda that takes a parameter and returns a lambda that does something with it.

Example:

multiply_function = -> (number) do
   -> (another_number) do
       number * another_number
   end
end

doubler = multiply_function.(2)
tripler = multiply_function.(3)

puts doubler.(4)
puts tripler.(4)

In the above example, the lambda will take number as a parameter, and return a lambda. When you call this lambda with another_number, it will return the product of the two.

Task

You are given a partially complete code. Your task is to fill in the blanks (_______).

Here, combination is a variable that stores a partial application which computes combination .