*maybe* it was also a joke :-)

Thiede, Christoph <Christoph.Thiede at student.hpi.uni-potsdam.de> schrieb am
Fr., 31. Jan. 2020, 18:22:

> When would you use this third boolean concretely? To me, this sounds
> rather like an overengineering solution, maybe premature optimization, for
> now ... :-)
>
>
> Best,
>
> Christoph
> ------------------------------
> *Von:* Squeak-dev <squeak-dev-bounces at lists.squeakfoundation.org> im
> Auftrag von Jakob Reschke <forums.jakob at resfarm.de>
> *Gesendet:* Freitag, 31. Januar 2020 18:16:51
> *An:* The general-purpose Squeak developers list
> *Betreff:* Re: [squeak-dev] Should you override #doesNotUnderstand: and
> #respondsTo: together?
>
> Regarding canUnderstand:, maybe it's time for the third boolean called "it
> depends" or "maybe". ;-)
>
> Thiede, Christoph <Christoph.Thiede at student.hpi.uni-potsdam.de> schrieb
> am Fr., 31. Jan. 2020, 10:43:
>
>> > Question is, should X class>>canUnderstand: be overwritten, too?
>>
>>
>> This would not be possible in my example, would it? Each json object
>> understands different keys ... This is also why I favor #respondsTo: over
>> #canUnderstand: in general.
>>
>>
>> Best,
>>
>> Christoph
>> ------------------------------
>> *Von:* Squeak-dev <squeak-dev-bounces at lists.squeakfoundation.org> im
>> Auftrag von Tobias Pape <Das.Linux at gmx.de>
>> *Gesendet:* Freitag, 31. Januar 2020 10:30:20
>> *An:* The general-purpose Squeak developers list
>> *Betreff:* Re: [squeak-dev] Should you override #doesNotUnderstand: and
>> #respondsTo: together?
>>
>>
>> > On 31.01.2020, at 10:14, Thiede, Christoph <
>> Christoph.Thiede at student.hpi.uni-potsdam.de> wrote:
>> >
>> > Hi all,
>> >
>> > just struggled over the fact that Json objects provide access to their
>> keys via #doesNotUnderstand:, but they do not override #respondsTo:.
>> Example:
>> >
>> > json := Json readFromString: '{"foo": 42}'.
>> > json foo. "42"
>> > json respondsTo: #foo. "false"
>> >
>> > Question: Is this discrepancy indeed desired behavior? Or should we
>> rather always try to override #doesNotUnderstand: and #respondsTo: together?
>>
>> This is actually done very seldom, IIRC.
>> But maybe a good pattern, tho. Question is, should X
>> class>>canUnderstand: be overwritten, too?
>>
>> Best regards
>>         -Tobias
>>
>> >
>> > Best,
>> > Christoph
>>
>>
>>
>>
>>
>
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