X-Git-Url: https://git.njae.me.uk/?a=blobdiff_plain;f=vendor%2Frails%2Factivesupport%2Flib%2Factive_support%2Fcore_ext%2Fhash%2Fdiff.rb;fp=vendor%2Frails%2Factivesupport%2Flib%2Factive_support%2Fcore_ext%2Fhash%2Fdiff.rb;h=6abd6788229acb599f9a14917a3c106cf56d3bd3;hb=437aa336c44c74a30aeea16a06743c32747ed661;hp=0000000000000000000000000000000000000000;hpb=97a0772b06264134cfe38e7494f9427efe0840a0;p=feedcatcher.git

diff --git a/vendor/rails/activesupport/lib/active_support/core_ext/hash/diff.rb b/vendor/rails/activesupport/lib/active_support/core_ext/hash/diff.rb
new file mode 100644
index 0000000..6abd678
--- /dev/null
+++ b/vendor/rails/activesupport/lib/active_support/core_ext/hash/diff.rb
@@ -0,0 +1,19 @@
+module ActiveSupport #:nodoc:
+  module CoreExtensions #:nodoc:
+    module Hash #:nodoc:
+      module Diff
+        # Returns a hash that represents the difference between two hashes.
+        #
+        # Examples:
+        #
+        #   {1 => 2}.diff(1 => 2)         # => {}
+        #   {1 => 2}.diff(1 => 3)         # => {1 => 2}
+        #   {}.diff(1 => 2)               # => {1 => 2}
+        #   {1 => 2, 3 => 4}.diff(1 => 2) # => {3 => 4}
+        def diff(h2)
+          self.dup.delete_if { |k, v| h2[k] == v }.merge(h2.dup.delete_if { |k, v| self.has_key?(k) })
+        end
+      end
+    end
+  end
+end