[ruby-core:78265] [Ruby trunk Feature#12971] (Refactoring) Remove `defined?` checks from observer.rb
From:
nobu@...
Date:
2016-11-22 23:01:14 UTC
List:
ruby-core #78265
Issue #12971 has been updated by Nobuyoshi Nakada.
You have to define the instance method, not setting instance variables on `Observable` module.
For example:
```ruby
module Initializer
def initialize(*)
@observer_peers ||= {}
@observer_state ||= false
super
end
end
def self.included(mod)
mod.prepend(Initializer)
super
end
```
----------------------------------------
Feature #12971: (Refactoring) Remove `defined?` checks from observer.rb
https://bugs.ruby-lang.org/issues/12971#change-61630
* Author: Nikolay Ponomarev
* Status: Open
* Priority: Normal
* Assignee:
----------------------------------------
Remove `defined?` checks from observer.rb
- Contains less code
- Easier to understand Observable logic
- No performance downgrade
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