# File lib/jekyll/core_ext.rb, line 30
  def pluralized_array(singular_key, plural_key)
    hash = self
    if hash.has_key?(singular_key)
      array = [hash[singular_key]] if hash[singular_key]
    elsif hash.has_key?(plural_key)
      case hash[plural_key]
      when String
        array = hash[plural_key].split
      when Array
        array = hash[plural_key].compact
      end
    end
    array || []
  end