[ruby-core:59297] [ruby-trunk - Bug #9291][Open] array splatting a nil works, but hash splatting a nil does not

[ruby-core:59297] [ruby-trunk - Bug #9291][Open] array splatting a nil works, but hash splatting a nil does not

[rits (First Last)]

Issue #9291 has been reported by rits (First Last).

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Bug #9291: array splatting a nil works, but hash splatting a nil does not
https://bugs.ruby-lang.org/issues/9291

Author: rits (First Last)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.0.0p353 (2013-11-22 revision 43784) [i686-linux]
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN


irb(main):001:0> [*nil]
=> []
irb(main):002:0> {**nil}
TypeError: no implicit conversion of nil into Hash



-- 
http://bugs.ruby-lang.org/

[ruby-core:59347] [ruby-trunk - Bug #9291] array splatting a nil works, but hash splatting a nil does not

[rits (First Last)]

Issue #9291 has been updated by rits (First Last).


this could be used like this: method a: 1, **({b: 1} if condition)
----------------------------------------
Bug #9291: array splatting a nil works, but hash splatting a nil does not
https://bugs.ruby-lang.org/issues/9291#change-43921

Author: rits (First Last)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.0.0p353 (2013-11-22 revision 43784) [i686-linux]
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN


irb(main):001:0> [*nil]
=> []
irb(main):002:0> {**nil}
TypeError: no implicit conversion of nil into Hash



-- 
http://bugs.ruby-lang.org/

[ruby-core:64191] [ruby-trunk - Bug #9291] array splatting a nil works, but hash splatting a nil does not

[meanlogin]

Issue #9291 has been updated by First Last.


So is there a reason * and ** should work differently for nil?


----------------------------------------
Bug #9291: array splatting a nil works, but hash splatting a nil does not
https://bugs.ruby-lang.org/issues/9291#change-48192

* Author: First Last
* Status: Open
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
* ruby -v: ruby 2.0.0p353 (2013-11-22 revision 43784) [i686-linux]
* Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
irb(main):001:0> [*nil]
=> []
irb(main):002:0> {**nil}
TypeError: no implicit conversion of nil into Hash




-- 
https://bugs.ruby-lang.org/

[ruby-core:64296] [ruby-trunk - Bug #9291] array splatting a nil works, but hash splatting a nil does not

[ruby-core]

Issue #9291 has been updated by Marc-Andre Lafortune.

Assignee set to Yukihiro Matsumoto

Currently, `*` uses explicit conversion to array (`to_a`, not `to_ary`), while `**` uses implicit conversion to hash (`to_hash`, not `to_h`).

So your question about `nil` can be explained this way, since `nil.to_a #=> []` but `nil.to_hash` is not defined.

The real question is then: shouldn't `**` be using explicit conversion to hash with to_h?

----------------------------------------
Bug #9291: array splatting a nil works, but hash splatting a nil does not
https://bugs.ruby-lang.org/issues/9291#change-48279

* Author: First Last
* Status: Open
* Priority: Normal
* Assignee: Yukihiro Matsumoto
* Category: 
* Target version: 
* ruby -v: ruby 2.0.0p353 (2013-11-22 revision 43784) [i686-linux]
* Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
irb(main):001:0> [*nil]
=> []
irb(main):002:0> {**nil}
TypeError: no implicit conversion of nil into Hash




-- 
https://bugs.ruby-lang.org/

[ruby-core:96304] [Ruby master Bug#9291] array splatting a nil works, but hash splatting a nil does not

[mame]

Issue #9291 has been updated by mame (Yusuke Endoh).

Backport deleted (1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN)
Status changed from Open to Rejected

Closing as it is by design.  If you want the change, please open a feature request ticket with a use case.

----------------------------------------
Bug #9291: array splatting a nil works, but hash splatting a nil does not
https://bugs.ruby-lang.org/issues/9291#change-83210

* Author: rits (First Last)
* Status: Rejected
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
* Target version: 
* ruby -v: ruby 2.0.0p353 (2013-11-22 revision 43784) [i686-linux]
* Backport: 
----------------------------------------
irb(main):001:0> [*nil]
=> []
irb(main):002:0> {**nil}
TypeError: no implicit conversion of nil into Hash




-- 
https://bugs.ruby-lang.org/