Grick Zh wrote: > Adam Stegman wrote: >> Or more concisely (because it's fun): >> <%=h @posts.map(&:name).to_sentence %> >> which will make it "Tom, Dick, and Harry". >
1) @posts.map This will return a new enumerable, replacing each element of @posts with whatever the block says 2) &:name Shortcut to indicate a block and a method. In this case, the method is :name (post.name) Other example: [1,2,3,4].inject(:+) # Sum every element of the array. Will of course fail if an element does not understand "+". 3) to_sentence We now have an array with names. "to_sentence" is, I believe, an activesupport method which joins the array into a string with commas, and adds "and " between the second to last and last item. -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-t...@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
