[#35631] [Ruby 1.9 - Bug #4558][Open] TestSocket#test_closed_read fails after r31230 — Tomoyuki Chikanaga <redmine@...>

23 messages 2011/04/06

[#35632] [Ruby 1.9 - Bug #4559][Open] Proc#== does not match the documented behaviour — Adam Prescott <redmine@...>

13 messages 2011/04/06

[#35637] [Ruby 1.9 - Bug #4561][Open] 1.9.2 requires parentheses around argument of method call in an array, where 1.8.7 did not — Dave Schweisguth <redmine@...>

9 messages 2011/04/07

[#35734] [Ruby 1.9 - Feature #4574][Open] Numeric#within — redmine@...

16 messages 2011/04/13

[#35753] [Ruby 1.9 - Bug #4576][Open] Range#step miss the last value, if end-exclusive and has float number — redmine@...

61 messages 2011/04/14
[#39566] [Ruby 1.9 - Bug #4576] Range#step miss the last value, if end-exclusive and has float number — Marc-Andre Lafortune <ruby-core@...> 2011/09/15

[#39590] [Ruby 1.9 - Bug #4576] Range#step miss the last value, if end-exclusive and has float number — Marc-Andre Lafortune <ruby-core@...> 2011/09/16

[#39593] Re: [Ruby 1.9 - Bug #4576] Range#step miss the last value, if end-exclusive and has float number — Tanaka Akira <akr@...> 2011/09/16

2011/9/17 Marc-Andre Lafortune <[email protected]>:

[#39608] Re: [Ruby 1.9 - Bug #4576] Range#step miss the last value, if end-exclusive and has float number — Masahiro TANAKA <masa16.tanaka@...> 2011/09/17

I have not been watching ruby-core, but let me give a comment for this issu=

[#35765] [Ruby 1.9 - Bug #4579][Open] SecureRandom + OpenSSL may repeat with fork — redmine@...

27 messages 2011/04/15

[#35866] [Ruby 1.9 - Bug #4603][Open] lib/csv.rb: when the :encoding parameter is not provided, the encoding of CSV data is treated as ASCII-8BIT — yu nobuoka <nobuoka@...>

13 messages 2011/04/24

[#35879] [Ruby 1.9 - Bug #4610][Open] Proc#curry behavior is inconsistent with lambdas containing default argument values — Joshua Ballanco <jballanc@...>

11 messages 2011/04/25

[#35883] [Ruby 1.9 - Bug #4611][Open] [BUG] Segementation fault reported — Deryl Doucette <me@...>

15 messages 2011/04/25

[#35895] [Ruby 1.9 - Feature #4614][Open] [RFC/PATCH] thread_pthread.c: lower RUBY_STACK_MIN_LIMIT to 64K — Eric Wong <normalperson@...>

10 messages 2011/04/25

[ruby-core:35924] [Ruby 1.9 - Feature #4621][Assigned] NilClass#to_hash

From: Yui NARUSE <redmine@...>
Date: 2011-04-27 07:46:01 UTC
List: ruby-core #35924
Issue #4621 has been updated by Yui NARUSE.

Category set to core
Status changed from Open to Assigned
Assignee set to Yukihiro Matsumoto


----------------------------------------
Feature #4621: NilClass#to_hash
http://redmine.ruby-lang.org/issues/4621

Author: Tsuyoshi Sawada
Status: Assigned
Priority: Normal
Assignee: Yukihiro Matsumoto
Category: core
Target version: 


Various methods defined on `NilClass` are handy to avoid Method undefined on NilClass errors. For example,

* `to_a` for multiple dimensioned array when there might not be some values for some indices:

        array[i].to_a[j].to_a[k]

* `to_s` for pattern match that might fail:

        string[regex].to_s*2

* `to_i`, `to_f`, `to_c` for index search that might fail, etc:

        array.index(element).to_i*3

But there is no `NilClass#to_hash` even though there is `Hash#to_hash`. If such method existed (equivalent to `class NilClass; def to_hash; {} end end`), then we would be able to do:

* `to_hash` for multiple embedded hash when there might not be some values for some keys:

        hash[:a].to_hash[:b].to_hash[:c]

Is there any reason why `to_a`, `to_s`, `to_i`, `to_f`, `to_c` are all defined on `NilClass` but not for `to_hash`? If there is not, I would like to request this feature.


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