ruby - Using a class object in case statement

Question

What is the best way to use a class object in case statement? Suppose I have a which is an instance of the Class class. I want to match it against different classes. If I do

case a
when String then ...
when Fixnum then ...
end

this will not give the intended result because even if a == String for example, a === String is not true. What is the clever way to do this?

Answer 1

I wouldn't use to_s, because "String".to_s would be "String", so maybe I'd do

case
when a == String then ...
when a == Fixnum then ...
end

or

a = String

case [a]
when [String] then puts "String"
when [Array] then puts "Array"
end