[erlang-questions] Fwd: Newbie question: avoiding massive 'case' statement

[Vlad Dumitrescu]

Hi!


 On Wed, Mar 5, 2008 at 9:59 PM, David Mitchell <monch1962@REDACTED> wrote:
 >  I've got a block of code that looks like:
 >  case TransactionType of
 >   "ZABC" ->
 >     zabc:process_request(Request);
 >   "Z123" ->
 >     z123:process_request(Request);
 >   "YPQX" ->
 >     ypqx:process_request(Request);
 >  ...
 >   TransactionType ->
 >     error_logger:info_msg("Unknown transaction type")
 >  end

 You could use something like

 get_handler("ZABC")  ->
  zabc;
 get_handler("Z123") ->
  z123;
 .......
 get_handler(_) ->
  error_logger:info_msg("Unknown transaction type"),
  error

 and in your code just call

 Module = get_Handler(TransactionType),
 case Module of
  error ->
    done;
  _ ->
    Module:process_request(Request);
 end,

 best regards,
 Vlad

 --
 Some people see things that are and ask, Why?
 Some people dream of things that never were and ask, Why not?
 Some people have to go to work and don't have time for all that.
 --- George Carlin



-- 
Some people see things that are and ask, Why?
Some people dream of things that never were and ask, Why not?
Some people have to go to work and don't have time for all that.
--- George Carlin