gistfile1.rbx

something = Array.new

puts "I am an #{something.class}"
case something
when Fixnum
  puts 'I\'m a number'
when Array
  puts 'I\'m an array'
else
  puts 'I\'m a monster! Aaaargh!'
end

if something.class == Array
  puts "I == Array"
end

gistfile2.txt

I am an Array
I'm an array
I == Array