binary multiple

binary_multiple.rb

# from http://stackoverflow.com/questions/19305067/regex-binary-multiple-of-4

class String
  def binary_multiple_4?
    (/^[10]*00$/ =~ self) == 0
  end
end

puts "4"
puts 4.to_s(2).binary_multiple_4?
puts "5"
puts 5.to_s(2).binary_multiple_4?
puts "long string4"
puts "long string4".binary_multiple_4?
puts "10"
puts 10.to_s(2).binary_multiple_4?


#4
#true
#5
#false
#long string4
#false
#10
#false

Will, you are genius