[erlang-questions] how to make beautifulll code of this working code
Wed Aug 12 15:54:45 CEST 2015
that process of discovery/experimentation was what
i was hoping to nudge the OP toward.
On 8/10/15 2:38 PM, Joe Armstrong wrote:
> On Mon, Aug 10, 2015 at 7:25 PM, Garrett Smith <g@REDACTED> wrote:
>> Personally I find the Erlang docs excellent, so this:
>> 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:
> One wild guess later (and some distant memory) I tried
> 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
>> This link provides an index, which might also be helpful for finding
>> the right module and function in the first place:
>> 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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