I see, thanks! On 2/4/11, Bill Felton <subscripti...@cagttraining.com> wrote: > Smalltalk is an OO programming language that had some dominance in the late > 80's through much of the 90s. It has proceeded to more or less commit > suicide through a variety of mechanisms. > By 'drop' I meant 'drop the context of the remarks', which in the original > post was discussing Smalltalk's default method return. > It isn't a major deal, overall, I think the most interesting remark has been > Alan Gauld's musings immediately prior to Emile's to which I responded. > Python defaults to None. > Smalltalk defaults to self, which is always the object executing the code > involved. > Alan points out that this is extremely convenient and can reduce the code > bulk involved when one wishes to string multiple operations together. > It is stylistically possible in Python to set methods to return 'self' > if/when that would be useful, but if it is not a language level feature, it > becomes a convention that one can only rely on in ones own code. > > regards, > Bill > > On Feb 4, 2011, at 11:56 AM, Alex Hall wrote: > >> On 2/4/11, Bill Felton <subscripti...@cagttraining.com> wrote: >>> Um, yes, emphatically yes. You missed the context, which was Smalltalk, >>> and >>> it is terms of Smalltalk that my reply is couched. >>> Yes, Python returns None. >>> Smalltalk returns self by default. >>> Given the dropped context, you are correct. >>> Given the context meant, I am. >> I was following this until now... what is this smalltalk and drop? >>> >>> regards, >>> Bill >>> >>> On Feb 4, 2011, at 9:28 AM, Emile van Sebille wrote: >>> >>>> On 2/4/2011 5:35 AM Bill Felton said... >>>> >>>>> Um, not quite correct -- methods *without a specified return value* >>>>> always return self, that is, the object which executed the method. >>>> >>>> Um, no. They return None. >>>> >>>>>>> class Test: >>>> ... def __init__(self):pass >>>> ... def test(self):pass >>>> ... >>>>>>> a=Test().test() >>>>>>> a >>>>>>> print a >>>> None >>>>>>> >>>> >>>> Emile >>>> >>>> _______________________________________________ >>>> Tutor maillist - Tutor@python.org >>>> To unsubscribe or change subscription options: >>>> http://mail.python.org/mailman/listinfo/tutor >>> >>> _______________________________________________ >>> Tutor maillist - Tutor@python.org >>> To unsubscribe or change subscription options: >>> http://mail.python.org/mailman/listinfo/tutor >>> >> >> >> -- >> Have a great day, >> Alex (msg sent from GMail website) >> mehg...@gmail.com; http://www.facebook.com/mehgcap > >
-- Have a great day, Alex (msg sent from GMail website) mehg...@gmail.com; http://www.facebook.com/mehgcap _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
