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| author | Peter Jaros <peter.a.jaros@gmail.com> | 2014-09-04 15:08:07 -0400 |
|---|---|---|
| committer | Peter Jaros <peter.a.jaros@gmail.com> | 2014-09-04 15:09:07 -0400 |
| commit | b947b6eca516fa08cd9a983c81c56af543e45dbf (patch) | |
| tree | 9e5314cbc084ca897f1245b4a6a7a8c231fac6de /guides/source/active_support_core_extensions.md | |
| parent | 703a2e8da1d3a68b3902d9024c6f0d1cd32435aa (diff) | |
| download | rails-b947b6eca516fa08cd9a983c81c56af543e45dbf.tar.gz rails-b947b6eca516fa08cd9a983c81c56af543e45dbf.tar.bz2 rails-b947b6eca516fa08cd9a983c81c56af543e45dbf.zip | |
Document that method objects are not `duplicable?`
Diffstat (limited to 'guides/source/active_support_core_extensions.md')
| -rw-r--r-- | guides/source/active_support_core_extensions.md | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/guides/source/active_support_core_extensions.md b/guides/source/active_support_core_extensions.md index 965de0c761..88d651e13c 100644 --- a/guides/source/active_support_core_extensions.md +++ b/guides/source/active_support_core_extensions.md @@ -162,7 +162,7 @@ Active Support provides `duplicable?` to programmatically query an object about false.duplicable? # => false ``` -By definition all objects are `duplicable?` except `nil`, `false`, `true`, symbols, numbers, class, and module objects. +By definition all objects are `duplicable?` except `nil`, `false`, `true`, symbols, numbers, and class, module, and method objects. 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. |