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require 'rubygems'
require 'recursively'
require 'facet/hash/stringify_keys'
require 'facet/hash/symbolize_keys'
require 'facet/symbol/to_proc'

# Array Example

nested = [ 'a', 'b', [ 'c', 'd', [ 'e', 'f' ] ], 'g', [ 'h' ] ]
nested.recursively!(&:upcase) # => ["A", "B", ["C", "D", ["E", "F"]], "G", ["H"]]

# Hash example

options = {
  :find => {
    :conditions => {
      'first_name' => 'john',
      :hair_color  => 'brown'
    },
    'order' => 'last_name',
    :limit  => 10
  },
  'create' => {
    :conditions => [ "hair_color = ?", 'brown' ]
  }
}

options.recursively!(&:symbolize_keys)
options[:find][:conditions][:first_name] # => "john"

options.recursively!(&:stringify_keys)
options['find']['conditions']['hair_color'] # => "brown"