ruby-on-rails - 如何使用获取的记录进行编号？

Question

此代码获取 10 条最新记录

@comments = @topic.comment_threads.order("created_at DESC").page(params[:page]).per(10)

我想对获取的记录进行编号。
因为是 desc 顺序，所以会是这样的

"Displaying comments 1 - 10 of 18 in total 

No. 18 Hi
No. 17 Hello
No. 16 Hola
No. 15 Howdy
No. 14 What's up
No. 13 Hi there
No. 12 Yo
No. 11 Oh
No. 10 Ah
No.  9 Eeeee

我怎样才能在 View 中得到这个编号？应该是这样的

<%= "No. " + ????????????? %>

Answer 1

使用each_with_index

@comments.each_with_index.map {|comment, index| "No #{index} #{comment}"}