From: sellberg@...
Date: 2017-01-22T15:46:38+00:00
Subject: [ruby-core:79217] [Ruby trunk Bug#13146] Float::NANs in Hashes are confusing (more than usual).

Issue #13146 has been reported by Linus Sellberg.

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Bug #13146: Float::NANs in Hashes are confusing (more than usual). 
https://bugs.ruby-lang.org/issues/13146

* Author: Linus Sellberg
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.3.1p112
* Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN
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`test = {Float::NAN => 1, -Float::NAN => 2}
=> {NaN=>1, NaN=>2}

test.values_at(Float::NAN, -Float::NAN)
=> [1, nil]`

I don't know what the correct behaviour ought to be, but it seems inconsistent to create a hash with two elements but not be able to extract both values.



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