[erlang-questions] how to make beautifulll code of this working code

[Joe Armstrong]

On Mon, Aug 10, 2015 at 5:46 PM, Roelof Wobben <r.wobben@REDACTED> wrote:
> Hello,
>
> I have to make a programm which convert the iso-date to a list of numbers so
> 2015-08-10 will be [2015,08,10]

Impossible - there is no data structure in Erlang whose print value is
[2015,08,10] -

Here a shell example:

  $erl
  Eshell V6.2  (abort with ^G)

  1> [2015,08,10].
  [2015,8,10]

   2> [2015,000000000000008,10].
   [2015,8,10]

The problem the leading zeros in the 08 - if you enter
0000000000008 the shell will print 8.

So the output can be [2015,8,10] but never [2015,08,10]

/Joe


>
> As a working programm I have wrote this :
>
> -module(dates).
>
> -export([date_parts/1]).
>
> date_parts(Date)->
>    [Year, Month, Day] = re:split(Date, "-", [{return, list}] ),
>    [element(1, string:to_integer(Year)),
> element(1,string:to_integer(Month)), element(1,string:to_integer(Day))].
>
> Now my question is how to make this code beautifull.
>
> I think myself to make seperate functions for extracting the numbers out of
> the list and one for converting the string to numbers.
>
> Roelof
>
>
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