From: "alexeymuranov (Alexey Muranov)" <redmine@...>
Date: 2013-12-11T05:14:36+09:00
Subject: [ruby-core:59034] [ruby-trunk - Feature #9239] Array#to_h ignores	flat arrays


Issue #9239 has been updated by alexeymuranov (Alexey Muranov).


If [:a, :b].to_h returned {:a => :b}, then what should [[:a, :b], [:c, :d]].to_h return?  {[:a, :b] => [:c, :d]} ?
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Feature #9239: Array#to_h ignores flat arrays
https://bugs.ruby-lang.org/issues/9239#change-43590

Author: sawa (Tsuyoshi Sawada)
Status: Open
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: 
Target version: 


=begin
My understanding was that the newly introduced `Array#to_h` was to be equivalent to `Hash.[]`. But when I give a flat array, it returns an empty hash:

    [:a, :b].to_h # => {}
    [:a].to_h     # => {}

I expected `{:a => :b}` for the first example, and `ArgumentError: odd number of arguments for Hash` for the second example, as is with `Hash[]`. Was it intended to be different? If so, why is that the case? Even if it is to be different, it should at least raise an error when a flat array is given.
=end



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