Delete all empty/false elements from Array of key value pairs recursively

gistfile1.rb

module ArrayKeyValueCleaner
  extend self

  # This makes use of a recursive proc to recurse into a deeply
  # nested set of arrays
  #
  # At the deepest array it will check if the next set of children
  # are not arrays and make sure they are valid key value pairs
  def call(value)
    return value unless value.is_a?(Array)

    p = proc do |*args|
      v = args.last
      v.delete_if(&p) if v.respond_to?(:delete_if)
      v.nil? || v.blank? || has_no_key_value_pair(v)
    end

    value.delete_if(&p)
  end

  def has_no_key_value_pair(array)
    array.is_a?(Array)        &&
    !array.first.is_a?(Array) &&
    array.length != 2
  end
end

I had a very specific need for key value pairs