diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/object/misc.rb')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/object/misc.rb | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/misc.rb b/activesupport/lib/active_support/core_ext/object/misc.rb index ea8e3a1d6a..aae336e6f4 100644 --- a/activesupport/lib/active_support/core_ext/object/misc.rb +++ b/activesupport/lib/active_support/core_ext/object/misc.rb @@ -31,4 +31,13 @@ class Object #:nodoc: def to_json ActiveSupport::JSON.encode(self) end + + # A duck-type assistant method. For example, ActiveSupport extends Date + # to define an acts_like_date? method, and extends Time to define + # acts_like_time?. As a result, we can do "x.acts_like?(:time)" and + # "x.acts_like?(:date)" to do duck-type-safe comparisons, since classes that + # we want to act like Time simply need to define an acts_like_time? method. + def acts_like?(duck) + respond_to? :"acts_like_#{duck}?" + end end
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