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author | Jeremy Kemper <jeremy@bitsweat.net> | 2009-03-28 23:43:03 -0700 |
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committer | Jeremy Kemper <jeremy@bitsweat.net> | 2009-03-28 23:43:26 -0700 |
commit | 609c1988d2e274b365c5299cc5933fb6855e4175 (patch) | |
tree | 83c132d1cca1f3eb632c06d007c76399f9bec5c3 /activesupport/lib/active_support/core_ext/object/acts_like.rb | |
parent | 389b081e374e0c6f2c124837439628684cd4f704 (diff) | |
download | rails-609c1988d2e274b365c5299cc5933fb6855e4175.tar.gz rails-609c1988d2e274b365c5299cc5933fb6855e4175.tar.bz2 rails-609c1988d2e274b365c5299cc5933fb6855e4175.zip |
Tease out Object#acts_like? behaviors
Diffstat (limited to 'activesupport/lib/active_support/core_ext/object/acts_like.rb')
-rw-r--r-- | activesupport/lib/active_support/core_ext/object/acts_like.rb | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/acts_like.rb b/activesupport/lib/active_support/core_ext/object/acts_like.rb new file mode 100644 index 0000000000..fcc8e50f06 --- /dev/null +++ b/activesupport/lib/active_support/core_ext/object/acts_like.rb @@ -0,0 +1,10 @@ +class Object + # A duck-type assistant method. For example, Active Support 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 |