Feature #21653: Unify Hash methods and preserving default/default_proc

• Status: Open
• Assignee: -
• Target version: -

[andrykonchin (Andrew Konchin)]

All the Hash methods that return a new instance of Hash don't preserve the default and default_proc properties except #compact and #merge:

h = {a: 1}
h.default = 0


h.compact[:f] == 0 # => true
h.merge(b: 2)[:f] == 0 # => true

Propose to unify Hash methods select/slice/reject/except/compact/merge/transform_values/transform_keys/invert/to_h/Hash[] and to preserve or not preserve default/default_proc altogether.

[petrenkorf (Petris Fernandes)]

I confirmed the behavior you described on version 3.2.4 while testing Hash#compact, but looks like it is already fixed on version 3.5.0dev (Although I did not checked the other methods you mentioned).

[petrenkorf (Petris Fernandes)]

I just confirmed the behavior described on version 3.5.0dev, but for Hash#select. I'll check other methods to see which of them are not preserving default and default_proc