Contents

#
# Author: Seth Vargo <[e-mail]>
#
# Copyright 2014 Chef Software, 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.
#

module Falcore
  module Util
    extend self

    #
    # Deeply fech the nested keys, returning +nil+ if an item along the
    # pathway returns +nil+.
    #
    # @param [Hash] hash
    #   the hash to deep fetch
    # @param [Array] keys
    #   the list of keys to fetch (in order)
    #
    def deep_fetch(hash = {}, *keys)
      keys.inject(hash.dup) do |hash, key|
        return nil if hash.nil?
        hash[key]
      end
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
falcore-0.2.0	lib/falcore/util.rb
falcore-0.1.1	lib/falcore/util.rb
falcore-0.1.0	lib/falcore/util.rb