# File rbtree.rb, line 74
 def search value
		curr = @root
		while true
			return nil if curr.nil?
			yield curr.value if block_given?
			case curr.value <=> value
			when 0
				return curr.value
			when -1
				curr = curr.left
			else
				curr = curr.right
			end
		end
		nil
	end