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This behavior changed in Ruby starting with 2.3.0, as a result of
https://bugs.ruby-lang.org/issues/11360. This results in a change in
behavior of these methods which is likely undesirable.
Fixes #27238
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`Class#descendants` has already been displayed in Rails guide,
so I think that may be displayed in doc.
http://guides.rubyonrails.org/active_support_core_extensions.html#descendants
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The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.
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Ruby 2.4 unifies Fixnum and Bignum into Integer: https://bugs.ruby-lang.org/issues/12005
* Forward compat with new unified Integer class in Ruby 2.4+.
* Backward compat with separate Fixnum/Bignum in Ruby 2.2 & 2.3.
* Drops needless Fixnum distinction in docs, preferring Integer.
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Fixes #22376.
JRuby 9.0.5.0 will support ObjectSpace.each_object against a
class's singleton class, since that's essentially just walking an
internal subclasses structure we already maintain. This test was
too narrow, requiring that each_object support an arbitrary class
but only actually needing it to work against a class's singleton.
This improves performance of Class.descendants by nearly two orders
of magnitude when run against JRuby 9.0.5.0:
```ruby
5.times { puts Benchmark.measure { 100_000.times { Numeric.descendants } } }
```
Before:
```
11.510000 0.140000 11.650000 ( 10.082384)
9.990000 0.020000 10.010000 ( 9.931233)
10.520000 0.040000 10.560000 ( 10.502978)
10.290000 0.030000 10.320000 ( 10.276027)
10.000000 0.030000 10.030000 ( 9.942429)
```
After:
```
1.380000 0.040000 1.420000 ( 0.365850)
0.210000 0.000000 0.210000 ( 0.149574)
0.180000 0.020000 0.200000 ( 0.141094)
0.140000 0.000000 0.140000 ( 0.140634)
0.190000 0.010000 0.200000 ( 0.147962)
```
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Sometimes, on Mac OS X, programmers accidentally press Option+Space
rather than just Space and don’t see the difference. The problem is
that Option+Space writes a non-breaking space (0XA0) rather than a
normal space (0x20).
This commit removes all the non-breaking spaces inadvertently
introduced in the comments of the code.
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https://github.com/evanphx/rubinius/issues/issue/11
https://github.com/evanphx/rubinius/commit/2fccbb5dad5cb3f5414d635547290538cfc0a2d4
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The former should be symmetric with ancestors and include all children. However, it should not include self since ancestors + descendants should not have duplicated. The latter is symmetric to superclass in the sense it only includes direct children.
By adopting a convention, we expect to have less conflict with other frameworks, as Datamapper. For this moment, to ensure ActiveModel::Validations can be used with Datamapper, we should always call ActiveSupport::DescendantsTracker.descendants(self) internally instead of self.descendants avoiding conflicts.
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descendents to descendants.
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anonymous? and constantize, and adds test coverage
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This reverts commits 7d312e54bad9c39634c137caec07dfc8df471650, 5f981ff0294ba45aa44ad15aa063970b29aeec44, f85f5dfc8ffefff174b695c6363211d342f77a57, 245bfafe335ff883f7a096eab95ac22fe2848679, and ec7c642f5fe60afc857aa64f1a9b4c2be56f9d70
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