Dennis Chuah wrote:
As for the use of class methods ... plenty. Eg., use it to replace
unit procedures and functions. Use it to implement singleton classes
and class factories.
Yes I agree, I've used them for this 'pseudo objectification', Its
inelegant to use them for singletons since they can't (couldn't!)
encapsulate the instance
Which leads me to another point, It would be nice (and maybe Delphi
does) have class variables reintroduced in subclasses ie
TSingleton = class
public
class var Instance;
end;
TSingletonA = class(TSingleton)
)
TSingletonB = class(TSingleton)
)
do a & B 'share' Instance?
Neven
overriden, etc. The 'self' parameter to class methods is the class
reference. Not as useless as Neven thinks.
----- Original Message ----- From: "David Moorhouse"
<[EMAIL PROTECTED]>
To: "NZ Borland Developers Group - Delphi List" <delphi@delphi.org.nz>
Sent: Wednesday, July 25, 2007 10:15 PM
Subject: Re: [DUG] basic question
AnInstance := TAnObject.Create;
if that's not a class method I'm not sure what is ;)
D
On Wed, 25 Jul 2007 21:33:25 +1200, you wrote:
Sean
Thanks, I grovel corrected :-), Still little use with no data, ie
Data +
Algorithms = Programs
N
Class methods have been around for years, explicitly. As in
TMyClass.DoSomething, no nil instances required.
have just looked it up in my "Using Delphi 3" (pub 1997) book that
I keep
lying around for no apparent reason, so it's been at least a decade.
Class variables etc are newer
Regards
Sean
---------------------------------------
Sean Cross
mailto:[EMAIL PROTECTED]
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-----Original Message-----
From: [EMAIL PROTECTED] [mailto:delphi-
[EMAIL PROTECTED] On Behalf Of Neven MacEwan
Sent: Wednesday, 25 July 2007 8:19 p.m.
To: NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] basic question
Dennis
Class methods have been around since Delphi 2. Where have you been
all these years?
Not explicitly, as I said, you cannot for example call them on the
class, you call them on a nil instance
which is hardly elegant php for example you would call a class method
by
TClass::Method()
To reinforce this, why did they introduce a 'class' keyword if they
were
already there?
N
Class types, consts and vars came in D2006, I think, or might be in
D2005.
----- Original Message ----- From: "Neven MacEwan" <[EMAIL PROTECTED]>
To: "NZ Borland Developers Group - Delphi List"
<delphi@delphi.org.nz>
Sent: Wednesday, July 25, 2007 7:25 PM
Subject: Re: [DUG] basic question
J
My point is Delphi (generic) does not have Class Methods/Vars or
are you saying that 'Delphi' only applies to D2005+
As for sarcasm, its a matter of opinion I found his response smug.
N
I'll answer for Chee Wee (not Chee - common mistake)
These articles were by Nick about changes since Delphi 7.
http://dn.codegear.com/article/34325 (VCL)
http://dn.codegear.com/article/34323 (IDE)
http://dn.codegear.com/article/34324 (Language)
I don't think his original reply was sarcastic either. Why
would he
need to clarify something, you're the one that didn't do any
research
before saying something. Especially when coming from a version
that
is
like 6 years old
(http://delphi.wikia.com/wiki/Borland_Compiler_Release_Dates).
Even if you don't run the latest version, it is hardly a great
effort
to subscribe to some blogs (www.delphifeeds.com).
As for when they came in, they are a by product of Delphi.NET. So
codegear doing .NET was good for something! So they came into the
win32 around D2005 and have become less buggy each release since.
cheers,
Jeremy
Chee
When did they sneak in?, Before you get all sarcastic I'd suggest
you
clarify things,
Some of us are using older versions (D6 in my case)
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