Bug #11508: Hash#eql? does not respect hash ordering

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-darwin14]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN

[eike.rb (Eike Dierks)]

{a:1,b:2}.eql?({b:2,a:1})
=> true

The eql? (aka ==) operator on hashes does not compare the ordering of the compared hashes.

This behaviour is documented in Hash#== (and should not be touched, ever)

I'd like to suggest:

• extend the documentation of Hash#== to explicitely state, that ordering is not compared
• add a new function in ruby5 to compare hashes with respect of the ordering,
  aka {a:1,b:2}.eql_with_order?({b:2,a:1}) => false

[eike.rb (Eike Dierks)]

ruby5 -> ruby3

maybe we should try it in rails support first.

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset r51763.

---

hash.c: [DOC] orders do not matter [ci skip]

• hash.c (rb_hash_equal, rb_hash_eql): [DOC] the orders of each
  hashes are not compared. [Bug #11508]

[nobu (Nobuyoshi Nakada)]

New ticket for a new method, please.