gistfile1.rb

      def apply_filters!(hash_or_array)
        case hash_or_array
        when Array
          for i in 0 ... hash_or_array.size do
            apply_filters!(hash_or_array[i])
          end
        when Hash
          hash_or_array.each do |key, value|
            next if value.nil?

            if value.is_a?(Hash) || value.is_a?(Array)
              apply_filters!(value)
            else
              filters.each do |placeholder, pattern|
                if pattern && key.match(pattern)
                  # require 'pry'
                  # binding.pry
                  hash_or_array[key] = "<#{placeholder}>"
                end
              end
            end
          end
        end

def apply_filters(subject, value=nil)
  case subject
  when nil
  when Array
    subject.map { |hash| apply_filters(hash) }
  when Hash
    Hash[ subject.map { |key, val| [ key, apply_filters(key, val) ] } ]
  else
    default = -> { [ value, nil ] }
    filter  = filters.find(default) { |placeholder, pattern| pattern && key.match pattern }
    "<%s>" % filter[0]
  end
end