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Updated AS guide with new Object#in? and Object#either? methods

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smartinez87 committed Apr 11, 2011
1 parent 3f283c2 commit 7a1189a2c75b16f86a11c1d2379c50b11a7a2d66
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  1. +22 −0 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+

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