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Document Object#public_send

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commit c80876f77880a97f94d2255ff9405bb080a6faa4 1 parent 2e2f3f5
@jonleighton jonleighton authored
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2  activesupport/lib/active_support/core_ext/object/public_send.rb
@@ -3,7 +3,7 @@
class Object
unless Object.public_method_defined?(:public_send)
# Backports Object#public_send from 1.9
- def public_send(method, *args, &block) # :nodoc:
+ def public_send(method, *args, &block)
# Don't create a singleton class for the object if it doesn't already have one
# (This also protects us from classes like Fixnum and Symbol, which cannot have a
# singleton class.)
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24 railties/guides/source/active_support_core_extensions.textile
@@ -452,6 +452,30 @@ Examples of +in?+:
NOTE: Defined in +active_support/core_ext/object/inclusion.rb+.
+h4. +public_send+
+
+This method is available by default in Ruby 1.9, and is backported to Ruby 1.8 by Active Support. Like the regular +send+ method, +public_send+ allows you to call a method when the name is not known until runtime. However, if the method is not public then a +NoMethodError+ exception will be raised.
+
+<ruby>
+class Greeter
+ def hello(who)
+ "Hello " + who
+ end
+
+ private
+
+ def secret
+ "sauce"
+ end
+end
+
+greeter = Greeter.new
+greeter.public_send(:hello, 'Jim') # => "Hello Jim"
+greeter.public_send(:secret) # => NoMethodError
+</ruby>
+
+NOTE: Defined in +active_support/core_ext/object/public_send.rb+.
+
h3. Extensions to +Module+
h4. +alias_method_chain+
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