From: Yusuke Endoh <redmine@...>
Date: 2010-09-21T21:56:31+09:00
Subject: [ruby-core:32488] [Ruby 1.9-Feature#3845] "in" infix operator

Issue #3845 has been updated by Yusuke Endoh.


Matz,

Thank you for your comment!


> |I'd propose "in" infix operator.
> |
> |(<arg> in <args>) yields true when <arg> is included in <arg>.
> |Otherwise it yields false.
>
> I am neutral for this proposal.  But the patch uses "case" internally
> thus comparison is done by "===".  Is this expected behavior?


The patch is just proof of concept.
I was not so particular about the implementation.  But, I thought of
the following code:

  if n in 5..10
    # ...
  end

This code works only when "===" is used (of course, unless range is
specially handled).  So I prefer "===".

However, I'm happy to rewrite a patch if you say "==" should be used.

-- 
Yusuke Endoh <mame@tsg.ne.jp>
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