Re: isa
Re: isa
- Subject: Re: isa
- From: Ondra Cada <email@hidden>
- Date: Sun, 2 Jun 2002 02:24:13 +0200
On Saturday, June 1, 2002, at 11:22 , Aram Greenman wrote:
...sending messages to self in an initalizer, which is _usually_ a bad
idea,
Quite the contrary. It is very, very often an extremely good idea. Just
please have a look at the "designated initializer" stuff.
since it is possible the method called might access unitialized instance
variables, depending on where you are in the initializer chain.
Agreed that this is some slight danger incurred by it, which has to be
worked around by a good documentation and common sense.
Setting isa temporarily to the class which defines the -init would
protect against this.
As a matter of fact, I see [self whatever] in init many times less a
danger than isa swizzling. Might be arguable, but at the very least least
the former is quite standard, documented behaviour, whilst the latter is
kinda hack.
---
Ondra Cada
OCSoftware: email@hidden
http://www.ocs.cz
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| | >Re: isa (From: Aram Greenman <email@hidden>) |