2010/10/10 Levente Uzonyi <leves at elte.hu>:
> On Sun, 10 Oct 2010, Igor Stasenko wrote:
>
>> 2010/10/10 Levente Uzonyi <leves at elte.hu>:
>>>
>>> On Sun, 10 Oct 2010, Igor Stasenko wrote:
>>>
>>>> On 10 October 2010 17:34, Randal L. Schwartz <merlyn at stonehenge.com>
>>>> wrote:
>>>>>>>>>>
>>>>>>>>>> "Igor" == Igor Stasenko <siguctua at gmail.com> writes:
>>>>>
>>>>> Igor> i am also missing:
>>>>>
>>>>> Igor> someThing ifTrue: 1 ifFalse: 0
>>>>>
>>>>> Down that path lies ambiguity though.
>>>>>
>>>>> If you had
>>>>>
>>>>>  actionSymbol := aBoolean ifTrue: #doThis else: #doThat.
>>>>>
>>>>> do you want the symbol assigned, or performed?
>>>>>
>>>>> Please don't add so much dwimmery here.  I like it that Smalltalk is
>>>>> fairly strict with these basic forms.
>>>>
>>>> what dwimmery you talking about?
>>>>
>>>> b :=  [ 15 ].
>>>> a :=  [ 16 ].
>>>>
>>>> true ifTrue: a ifFalse: b
>>>> 16
>>>>
>>>> as well as:
>>>>
>>>> b :=  15 .
>>>> a :=  16 .
>>>>
>>>> true ifTrue: a ifFalse: b
>>>> 16
>>>>
>>>> works well.
>>>>
>>>>
>>>> In this way,
>>>>
>>>> answer := process ifNotNil: #terminate.
>>>>
>>>> should be equivalent to:
>>>>
>>>> answer := process notNil ifTrue: #terminate
>>>>
>>>> but not to:
>>>>
>>>> answer := process notNil ifTrue: [ process terminate ].
>>>
>>> How would you implement #ifNotNil: to reflect this? Would you dispatch on
>>> the type of the argument?
>>>
>>
>> true ifTrue sends #value to its argument. What is wrong with such kind
>> of dispatch?
>
> That kind of dispatch is ok, but would you really add this method to every
> object?
>
> Object >> cull: anObject
>
>        ^self
>

That's a good question. I'm not sure.

Object >> cull: anObject
  "receiver should behave as a monadic block"
        ^self


>
> Levente
>
>>
>> But okay.. i see that
>>
>>  foo ifNotNil: #bar
>>
>> is more userful in a form, when it leads to
>>
>> foo perform: #bar
>>
>> rather than just returning #bar.
>>
>>
>>>
>>> Levente
>>>
>>>>
>>>>
>>>>>
>>>>> --
>>>>> Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777
>>>>> 0095
>>>>> <merlyn at stonehenge.com> <URL:http://www.stonehenge.com/merlyn/>
>>>>> Smalltalk/Perl/Unix consulting, Technical writing, Comedy, etc. etc.
>>>>> See http://methodsandmessages.posterous.com/ for Smalltalk discussion
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Best regards,
>>>> Igor Stasenko AKA sig.
>>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>> --
>> Best regards,
>> Igor Stasenko AKA sig.
>>
>
>
>
>



-- 
Best regards,
Igor Stasenko AKA sig.