X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/9156448ad6f1601c1c49a75ce58b0a0e932a51ed..a69f380fa5641192b55738d54f2c26e1403f6975:/vendor/gems/composite_primary_keys-2.2.2/test/hash_tricks.rb

diff --git a/vendor/gems/composite_primary_keys-2.2.2/test/hash_tricks.rb b/vendor/gems/composite_primary_keys-2.2.2/test/hash_tricks.rb
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+++ b/vendor/gems/composite_primary_keys-2.2.2/test/hash_tricks.rb
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+# From:
+# http://www.bigbold.com/snippets/posts/show/2178
+# http://blog.caboo.se/articles/2006/06/11/stupid-hash-tricks
+# 
+# An example utilisation of these methods in a controller is:
+# def some_action
+#    # some script kiddie also passed in :bee, which we don't want tampered with _here_.
+#    @model = Model.create(params.pass(:foo, :bar))
+#  end
+class Hash
+
+  # lets through the keys in the argument
+  # >> {:one => 1, :two => 2, :three => 3}.pass(:one)
+  # => {:one=>1}
+  def pass(*keys)
+    keys = keys.first if keys.first.is_a?(Array)
+    tmp = self.clone
+    tmp.delete_if {|k,v| ! keys.include?(k.to_sym) }
+    tmp.delete_if {|k,v| ! keys.include?(k.to_s) }
+    tmp
+  end
+
+  # blocks the keys in the arguments
+  # >> {:one => 1, :two => 2, :three => 3}.block(:one)
+  # => {:two=>2, :three=>3}
+  def block(*keys)
+    keys = keys.first if keys.first.is_a?(Array)
+    tmp = self.clone
+    tmp.delete_if {|k,v| keys.include?(k.to_sym) }
+    tmp.delete_if {|k,v| keys.include?(k.to_s) }
+    tmp
+  end
+
+end