goz · June 1, 2010 21:35
diff --git a/prime_number.rb b/prime_number.rb
 def prime_number(max)
  arr = (2..max).to_a
  (2..Math::sqrt(max)).each do |i|
     arr.delete_if {|a|a % i == 0 && a!=i}
   end
   arr
 end
 
 # generate
 # puts prime_number(20)
	def prime_number(max)
	arr = (2..max).to_a
	(2..Math::sqrt(max)).each do \|i\|
	arr.delete_if {\|a\|a % i == 0 && a!=i}
	end
	arr
	end

	# generate
	# puts prime_number(20)