sum_of_numerous_arguments.rb

# After calling the function findSum() with any number of non-negative integer arguments, it should return the sum of all those arguments. If no arguments are given, the function should return 0, if negative arguments are given, it should return -1.

# eg

# find_sum(1,2,3,4); # returns 10 
# find_sum(1,-2);    # returns -1 
# find_sum();        # returns 0 0
# Hint: research the arguments object on google or read Chapter 4 from Eloquent Javascript

def findSum()
	numbers.inject(0) { |sum, number| sum + number }
end