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

[Felix Gallo]

as the official e-mail list correction pedant this week:

> re:split("2015-08-06","-"),[{return,list}].

doesn't return ["2015","08","06"].

>  re:split("2015-08-06","-",[{return,list}]).

is what Joe likely meant.

F.

On Mon, Aug 10, 2015 at 11:38 AM, Joe Armstrong <erlang@REDACTED> wrote:

> On Mon, Aug 10, 2015 at 7:25 PM, Garrett Smith <g@REDACTED> wrote:
> > Personally I find the Erlang docs excellent, so this:
> >
> > http://erlang.org/doc/man/re.html#split-2
> >
> > Roelof, I recommend that you spend some cycles reading these as a
> > matter of course when you're using a function. The docs will help you
> > get things right and you'll start to absorb some Erlang zen. The list
> > is great to help after you've done that and still have questions.
>
> My goodness reading the manual first. I thought this was the
> only done when evoking the "if all else fails read the friendly manual bit"
>
> I usually poke around in the shell first.
> Not having a clue how re:split worked I guessed and tried this:
>
> > re:split("2015-08-06","-").
> [<<"2015">>,<<"08">>,<<"06">>]
>
> One wild guess later (and some distant memory) I tried
>
> > re:split("2015-08-06","-"),[{return,list}].
> ["2015","08","06"]
>
> Life is too short to waste it reading manual pages - or is it the other way
> around - life is too short to waste it by not reading manual pages - I
> can'tmake my mind up
>
> Cheers
>
> /Joe
>
>
>
>
> >
> > This link provides an index, which might also be helpful for finding
> > the right module and function in the first place:
> >
> > http://erldocs.com
> >
> > On Mon, Aug 10, 2015 at 11:33 AM, Garry Hodgson <garry@REDACTED>
> wrote:
> >> right, because re.split() returns a list of binaries ( <<"2012">> )
> >> where string:tokens() returns a list of strings ( "2012" ).
> >>
> >> so you either need to see if you can convince re:split() to
> >> return strings, or you need to coerce its output values
> >> from binaries to lists prior to converting those lists to integers.
> >>
> >>
> >>
> >> On 8/10/15 12:09 PM, Roelof Wobben wrote:
> >>>
> >>> Op 10-8-2015 om 17:59 schreef Garry Hodgson:
> >>>>
> >>>> date_parts(Date) ->
> >>>>     [list_to_integer(N) || N <- string:tokens(Date,"-")].
> >>>
> >>>
> >>> When testing I see this output:
> >>>
> >>> 2> dates:date_parts("2012-02-02").
> >>>  ** exception error: bad argument in function list_to_integer/1 called
> as
> >>> list_to_integer(<<"2012">>) in call from
> dates:'-date_parts/1-lc$^0/1-0-'/1
> >>> (dates.erl, line 6)
> >>>
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