Enumeratorに関する妄想 - Hello, world! - s21g

1 <% posts.each.if do %> 2 <ul> 3 <% iterate do |post| %> 4 <li><%= h(post.body) %></li> 5 <% end %> 6 </ul> 7 <% end.else %> 8 <div> 9 Not yet posted. 10 </div> 11 <% end %> 1 module Enumerable 2 class Iterator 3 def initialize(enumerable) 4 @enumerable = enumerable 5 end 6 7 def iterate(&block) 8 block.call(@enumerable.next) while true 9 rescue StopIteration 10 end 11 end 12