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author | Sebastian Martinez <sebastian@wyeworks.com> | 2011-04-11 20:09:22 -0300 |
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committer | Sebastian Martinez <sebastian@wyeworks.com> | 2011-04-11 20:09:22 -0300 |
commit | 7a1189a2c75b16f86a11c1d2379c50b11a7a2d66 (patch) | |
tree | c9346104a185a2c75992139382c9c3c7df3c8857 /railties/guides | |
parent | 3f283c2dd597db2b517edee0cd64cca19abc35b8 (diff) | |
download | rails-7a1189a2c75b16f86a11c1d2379c50b11a7a2d66.tar.gz rails-7a1189a2c75b16f86a11c1d2379c50b11a7a2d66.tar.bz2 rails-7a1189a2c75b16f86a11c1d2379c50b11a7a2d66.zip |
Updated AS guide with new Object#in? and Object#either? methods
Diffstat (limited to 'railties/guides')
-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+ |