From: duerst@...
Date: 2015-11-04T05:24:44+00:00
Subject: [ruby-core:71329] [Ruby trunk - Feature #11653] Add to_proc on Hash

Issue #11653 has been updated by Martin D��rst.

Assignee set to Yukihiro Matsumoto

I think this is an excellent idea. I hope this can make it into Ruby 2.3.

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Feature #11653: Add to_proc on Hash
https://bugs.ruby-lang.org/issues/11653#change-54703

* Author: Daniel P. Clark
* Status: Open
* Priority: Normal
* Assignee: Yukihiro Matsumoto
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Procs can be called the same way a hash is with `[]`.  But a Hash is not mappable as a Proc.

    my_hash = ->key{{
      a: 1, b: 2, c: 3, d: 4, e: 5, f: 6
    }[key]}

    my_hash[:a]
    # => 1

    [:e, :a, :b, :f, :c, :d].map(&my_hash) # hash is now mappable
    # => [5, 1, 2, 6, 3, 4]

This seems so straight forward I believe it should be part of the language itself with the .to_proc method call.



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