From: "alexeymuranov (Alexey Muranov)" <redmine@...>
Date: 2013-03-02T00:30:27+09:00
Subject: [ruby-core:53073] [ruby-trunk - Feature #7994] Make iterators pass an implicit named parameter `iteration` to the executed block


Issue #7994 has been updated by alexeymuranov (Alexey Muranov).


=begin
As a use case, i wanted to create a pagination navigation element on a web page in ((*Haml*)) template. What i ended up with looks redundant to me. With the suggested feature, i would be able to do:

  %nav.pagination
    - [page_ranges_before, page_ranges_after].each do |page_ranges|
      - unless iteration.first?
        %span.page.active
          = active_page
      - page_ranges.each do |range|
        - unless iteration.first?
          %span.ellipsis
            ���
        - range.each do |page|
          %button.page{ :type  => :submit, :name  => :page, :value => page }
            = page
=end

----------------------------------------
Feature #7994: Make iterators pass an implicit named parameter `iteration` to the executed block
https://bugs.ruby-lang.org/issues/7994#change-37226

Author: alexeymuranov (Alexey Muranov)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 


=begin
I think it would be nice to be able to write something like this:

  items.each do |item|
    unless iteration.first?
      # do something that is not applicable to the first iteration
    end
    # do whatever is to be done to all items
  end
=end



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