allow hash arguments

[takkanm]

test all combinations of values.

You can be described as follows.

# use Traditional 

where(:a, :b, :c) do
  [[1, 5, 2], [1, 5, 4], [1, 7, 2], [1, 7, 4], [1, 9, 2], [1, 9, 4], [3, 5, 2], [3, 5, 4], [3, 7, 2], [3, 7, 4], [3, 9, 2], [3, 9, 4]]
end

# use Hash argument
 where(a: [1, 3], b: [5, 7, 9], c: [2, 4])

[joker1007]

(params = args[0]).instance_of?(Hash) is not reader friendly.
params assignment should be in if block

[takkanm]

I fix it.

[joker1007]

Thanks!!