1 files changed, 8 insertions, 6 deletions
diff --git a/activesupport/lib/active_support/core_ext/array/uniq_by.rb b/activesupport/lib/active_support/core_ext/array/uniq_by.rb
index 9c5f97b0e9..edc164dabd 100644
--- a/activesupport/lib/active_support/core_ext/array/uniq_by.rb
+++ b/activesupport/lib/active_support/core_ext/array/uniq_by.rb
@@ -3,14 +3,16 @@ class Array
   #
   #   [1, 2, 3, 4].uniq_by { |i| i.odd? } # => [1, 2]
   #
-  def uniq_by
-    hash, array = {}, []
-    each { |i| hash[yield(i)] ||= (array << i) }
-    array
+  def uniq_by(&block)
+    ActiveSupport::Deprecation.warn "uniq_by " \
+      "is deprecated. Use Array#uniq instead", caller
+    uniq(&block)
   end
 
   # Same as uniq_by, but modifies self.
-  def uniq_by!
-    replace(uniq_by{ |i| yield(i) })
+  def uniq_by!(&block)
+    ActiveSupport::Deprecation.warn "uniq_by! " \
+      "is deprecated. Use Array#uniq! instead", caller
+    uniq!(&block)
   end
 end