Array range set thing

array_with_then.rb

class Array
	def with(range)
		range.each do |i|
			self.push i if not self.include? i
		end
		self
	end

	def then(range)
		self.with(range)
	end
end

[].with('a'..'z').then('A'..'Z').then('0'..'9').then(' '..'~').then(0..255)

Gives us the set of all 256 characters, ordered by lowercase first, then uppercase, then numbers, then symbols, then the rest.