From: Kurtis Rainbolt-Greene <kurtisrainboltgreene@...>
Date: 2011-07-21T15:20:49+09:00
Subject: [ruby-core:38316] [Ruby 1.9 - Feature #5054] Compress a sequence of ends


Issue #5054 has been updated by Kurtis Rainbolt-Greene.


> The best strategy that I have come up with is to arbitrarily insert/remove additional ends somewhere, and see what happens, and zoom in on the problem location with something close to binary search.

This is something I've definitely encountered, along with all of my students. I'm not so sure it's a Ruby specific thing though. Perhaps a solution in a different language has already been designed.

> end!, end*, endall. Counting is not very serious.

I would definitely use endall or end!, or even both. An example:

    method do
      method2 do
        method3 do
          puts "red!"
    endall
----------------------------------------
Feature #5054: Compress a sequence of ends
http://redmine.ruby-lang.org/issues/5054

Author: Yasushi ANDO
Status: Assigned
Priority: Normal
Assignee: Yasushi ANDO
Category: Joke
Target version: 


Though as matz said at rubykaigi2011 ruby is a quite good language, many people hate a long sequence of `end' like this:

module MyModule
  class MyClass
    def my_method
      10.times do
        if rand < 0.5 
          p :small
        end 
      end 
    end 
  end 
end

So, I'd like to propose introducing a special keyword, en(n+)d. Using this keyword, we can rewrite the above example like this:

module MyModule
  class MyClass
    def my_method
      10.times do
        if rand < 0.5 
          p :small
        ennnnnd 

I know matz's already rejected a python-style block. He wrote:

> it works badly with
>   * tab/space mixture
>   * templates, e.g. eRuby
>   * expression with code chunk, e.g lambdas and blocks
http://www.ruby-forum.com/topic/108457

These bad things won't occur by introducing en(n+)d.

Some implementations already exists.

JRuby
- https://gist.github.com/1088363

CRuby
- http://www.atdot.net/sp/raw/kn9iol
- http://d.hatena.ne.jp/ku-ma-me/20110718/p1

Thanks for your consideration.


-- 
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