mongo-ruby-driver/lib/mongo/util/core_ext.rb

# encoding: UTF-8

# --
# Copyright (C) 2008-2010 10gen Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ++

#:nodoc:
class Object

  #:nodoc:
  def tap
    yield self
    self
  end unless respond_to? :tap

end

#:nodoc:
module Enumerable

  #:nodoc:
  def each_with_object(memo)
    each { |element| yield(element, memo) }
    memo
  end unless [].respond_to?(:each_with_object)

end

#:nodoc:
class Hash

  #:nodoc:
  def assert_valid_keys(*valid_keys)
    unknown_keys = keys - [valid_keys].flatten
    raise(ArgumentError, "Unknown key(s): #{unknown_keys.join(", ")}") unless unknown_keys.empty?
  end

end