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.