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Diffstat (limited to 'guides')
| -rw-r--r-- | guides/source/active_support_core_extensions.md | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/guides/source/active_support_core_extensions.md b/guides/source/active_support_core_extensions.md index 8cb49ca6ae..f36cacfe8d 100644 --- a/guides/source/active_support_core_extensions.md +++ b/guides/source/active_support_core_extensions.md @@ -155,15 +155,6 @@ Complex(1).duplicable? # => true 1.method(:+).duplicable? # => false ``` -`duplicable?` matches the current Ruby version's `dup` behavior, -so results will vary according the version of Ruby you're using. -In Ruby 2.4, for example, Complex and Rational are not duplicable: - -```ruby -Rational(1).duplicable? # => false -Complex(1).duplicable? # => false -``` - WARNING: Any class can disallow duplication by removing `dup` and `clone` or raising exceptions from them. Thus only `rescue` can tell whether a given arbitrary object is duplicable. `duplicable?` depends on the hard-coded list above, but it is much faster than `rescue`. Use it only if you know the hard-coded list is enough in your use case. NOTE: Defined in `active_support/core_ext/object/duplicable.rb`. @@ -2358,10 +2349,6 @@ There's also a related idiom that uses the splat operator: [*object] ``` -which in Ruby 1.8 returns `[nil]` for `nil`, and calls to `Array(object)` otherwise. (Please if you know the exact behavior in 1.9 contact fxn.) - -Thus, in this case the behavior is different for `nil`, and the differences with `Kernel#Array` explained above apply to the rest of `object`s. - NOTE: Defined in `active_support/core_ext/array/wrap.rb`. ### Duplicating |