[#98621] Re: Function getlogin_r()'s protoype] — Bertram Scharpf <lists@...>
FYI,
3 messages
2020/06/02
[#98947] [Ruby master Feature#16986] Anonymous Struct literal — ko1@...
Issue #16986 has been reported by ko1 (Koichi Sasada).
66 messages
2020/06/26
[#98962] [Ruby master Bug#16988] Kernel.load loads file from current directory without '.' in path — misharinn@...
Issue #16988 has been reported by TheSmartnik (Nikita Misharin).
5 messages
2020/06/26
[#98969] [Ruby master Feature#16994] Sets: shorthand for frozen sets of symbols / strings — marcandre-ruby-core@...
Issue #16994 has been reported by marcandre (Marc-Andre Lafortune).
7 messages
2020/06/26
[#100117] [Ruby master Feature#16994] Sets: shorthand for frozen sets of symbols / strings
— matz@...
2020/09/25
Issue #16994 has been updated by matz (Yukihiro Matsumoto).
[ruby-core:98968] [Ruby master Feature#16993] Sets: from hash keys using Hash#key_set
From:
marcandre-ruby-core@...
Date:
2020-06-26 20:31:27 UTC
List:
ruby-core #98968
Issue #16993 has been reported by marcandre (Marc-Andre Lafortune).
----------------------------------------
Feature #16993: Sets: from hash keys using Hash#key_set
https://bugs.ruby-lang.org/issues/16993
* Author: marcandre (Marc-Andre Lafortune)
* Status: Open
* Priority: Normal
----------------------------------------
To create a set from hash keys currently implies a temporary array for all keys, rehashing all those keys and rebuilding a hash. Instead, the hash could be copied and its values set to `true`.
```ruby
h = {a: 1}
# Now:
Set.new(h.keys) # => Set[:a]
# After
h.key_set # => Set[:a], efficiently.
```
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