1 files changed, 26 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/hash/slice.rb b/activesupport/lib/active_support/core_ext/hash/slice.rb
new file mode 100644
index 0000000000..3d0f8a1e62
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/hash/slice.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+class Hash
+  # Replaces the hash with only the given keys.
+  # Returns a hash containing the removed key/value pairs.
+  #
+  #   hash = { a: 1, b: 2, c: 3, d: 4 }
+  #   hash.slice!(:a, :b)  # => {:c=>3, :d=>4}
+  #   hash                 # => {:a=>1, :b=>2}
+  def slice!(*keys)
+    omit = slice(*self.keys - keys)
+    hash = slice(*keys)
+    hash.default      = default
+    hash.default_proc = default_proc if default_proc
+    replace(hash)
+    omit
+  end
+
+  # Removes and returns the key/value pairs matching the given keys.
+  #
+  #   { a: 1, b: 2, c: 3, d: 4 }.extract!(:a, :b) # => {:a=>1, :b=>2}
+  #   { a: 1, b: 2 }.extract!(:a, :x)             # => {:a=>1}
+  def extract!(*keys)
+    keys.each_with_object(self.class.new) { |key, result| result[key] = delete(key) if has_key?(key) }
+  end
+end