case مع الأصناف وRegex

def describe(value)
  case value
  when Integer then "a whole number"
  when Float   then "a decimal"
  when String  then "some text"
  else              "something else"
  end
end

puts describe(42)      # عدد صحيح
puts describe(3.14)    # عدد عشري
puts describe("hi")    # بعض النص

def kind_of(text)
  case text
  when /^\d+$/        then "all digits"
  when /@/            then "looks like an email"
  when /^[A-Z]/       then "starts with a capital"
  else                     "other"
  end
end