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author | Gonçalo Silva <goncalossilva@gmail.com> | 2011-04-17 17:08:49 +0100 |
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committer | Gonçalo Silva <goncalossilva@gmail.com> | 2011-04-17 17:08:49 +0100 |
commit | 1c2b2233c3a7ec76c0a0eddf5b8be45c489be133 (patch) | |
tree | 56f2b767c3a4f1f14c51606bf2cbb714a98c5f89 /railties/guides/source/active_support_core_extensions.textile | |
parent | 8d558cb1b069410c8f693295c9c4e2ffc9661e06 (diff) | |
parent | b6843f22ac42b503f6b8ac00105ca0679049be7d (diff) | |
download | rails-1c2b2233c3a7ec76c0a0eddf5b8be45c489be133.tar.gz rails-1c2b2233c3a7ec76c0a0eddf5b8be45c489be133.tar.bz2 rails-1c2b2233c3a7ec76c0a0eddf5b8be45c489be133.zip |
Merge branch 'master' of https://github.com/rails/rails into performance_test
Diffstat (limited to 'railties/guides/source/active_support_core_extensions.textile')
-rw-r--r-- | railties/guides/source/active_support_core_extensions.textile | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/railties/guides/source/active_support_core_extensions.textile b/railties/guides/source/active_support_core_extensions.textile index 788f528654..3ba840c044 100644 --- a/railties/guides/source/active_support_core_extensions.textile +++ b/railties/guides/source/active_support_core_extensions.textile @@ -442,6 +442,28 @@ require_library_or_gem('mysql') NOTE: Defined in +active_support/core_ext/kernel/requires.rb+. +h4. +in?+ and +either?+ + +The predicate +in?+ tests if an object is included in another object, and the predicate +either?+ tests if an object is included in a list of objects which will be passed as arguments. + +Examples of +in?+: + +<ruby> + 1.in?([1,2]) # => true + "lo".in?("hello") # => true + 25.in?(30..50) # => false +</ruby> + +Examples of +either?+: + +<ruby> + 1.either?(1,2,3) # => true + 5.either?(1,2,3) # => false + [1,2,3].either?([1,2,3], 2, [3,4,5]) # => true +</ruby> + +NOTE: Defined in +active_support/core_ext/object/inclusion.rb+. + h3. Extensions to +Module+ h4. +alias_method_chain+ |