ruby - How to generate direct access keys to nested hash which contains hash and arrays as values? -

i want compare 2 xml files 1 input , other output. converting both hash.

my idea keys input xml converted hash, , search each key in both input , output hashes respective key/value pairs.

i have hash:

{   "requisition_header" => {     "requested_by" => {"login" => "coupasupport"},     "department" => {"name" => "marketing"},     "ship_to_address" => {"name" => "address_1431693296"},     "justification" => nil,     "attachments" => [],     "requisition_lines" => [       {         "description" => "cleaning services building a",         "line_num" => 1,         "need_by_date" => 2010-09-23 07:00:00 utc,         "source_part_num" => nil,         "supp_aux_part_num" => nil,         "unit_price" => #<bigdecimal:a60520c,'0.3e4',9(18)>,         "supplier" => {"name" => "amazon.com"},           "account" => {           "code" => "sf-marketing-indirect",           "account_type" => {"name" => "ace corporate"}         },         "currency" => {"code" => "usd"},         "payment_term" => {"code" => "net 30"},         "shipping_term" => {"code" => "standard"},         "commodity" => {"name" => "marketing-services"}       }     ]   } } 

it nested , values not directly accessible.

i want way generate direct access each value in hash.

for example:

requisition_header.requested_by.login 

will access "coupasupport".

requisition_header.department.name 

will access "marketing".

requisition_header.requisition_lines[0].description 

will access "cleaning services building a".

requisition_header.requisition_lines[0].line_num 

will access "1".

requisition_header.requisition_lines[0].need_by_date 

will access "2010-09-23 07:00:00 utc".

each key built can used search value directly inside hash.

that done following method, translates nested hash nested openstructs:

require 'ostruct' def deep_structify(hash)   result = {}   hash.each |key, value|     result[key] = value.is_a?(hash) ? deep_structify(value) : value   end if hash   openstruct.new(result) end  hash = {"requisition_header"=>{"requested_by"=>{"login"=>"coupasupport"}, "department"=>{"name"=>"marketing"}, "ship_to_address"=>{"name"=>"address_1431693296"}, "justification"=>nil, "attachments"=>[], "requisition_lines"=>[{"description"=>"cleaning services building a", "line_num"=>1, "need_by_date"=>2010-09-23 07:00:00 utc, "source_part_num"=>nil, "supp_aux_part_num"=>nil, "unit_price"=>#<bigdecimal:a60520c,'0.3e4',9(18)>, "supplier"=>{"name"=>"amazon.com"}, "account"=>{"code"=>"sf-marketing-indirect", "account_type"=>{"name"=>"ace corporate"}}, "currency"=>{"code"=>"usd"}, "payment_term"=>{"code"=>"net 30"}, "shipping_term"=>{"code"=>"standard"}, "commodity"=>{"name"=>"marketing-services"}}]}}  struct = deep_structify(hash)  struct.requisition_header.department.name #=> "marketing"