I wrote a class and have objects from this class added to an
arraylist. When I retrieve the objects from the arraylist, should I
use ctype or directcast to cast them back to the original class.?
28  1860 
Assuming that both CType and DirectCast work for your class, then the best
thing to do is measure the relative performance of both and use the one that
gives the best results.
"wanwan" <er*******@yaho o.comwrote in message
news:11******** **************@ q2g2000cwa.goog legroups.com...
>I wrote a class and have objects from this class added to an
arraylist. When I retrieve the objects from the arraylist, should I
use ctype or directcast to cast them back to the original class.?
Eric
DirectCast means cast direct without testing if that is possibel
Ctyps means convert if needed and cast as not needed.
So there will probably only an not measurable quicker behaviour for the
Direct Cast
Cor
"wanwan" <er*******@yaho o.comschreef in bericht
news:11******** **************@ q2g2000cwa.goog legroups.com...
>I wrote a class and have objects from this class added to an
arraylist. When I retrieve the objects from the arraylist, should I
use ctype or directcast to cast them back to the original class.?
wanwan wrote:
I wrote a class and have objects from this class added to an
arraylist. When I retrieve the objects from the arraylist, should I
use ctype or directcast to cast them back to the original class.?
As you want to cast the reference, not covert the object, you should use
DirectCast.
If you use framework 2.0, you can use a generic list instead of the
ArrayList, then you don't need the cast.
--
Göran Andersson
_____ http://www.guffa.com
Hello
If you use framework 2.0, you can use a generic list instead of the
ArrayList, then you don't need the cast.
Before you misinterpreted this as "faster" by documentation yes however
in practice casting is faster
regards
michel
"Göran Andersson" <gu***@guffa.co mschreef in bericht
news:%2******** ********@TK2MSF TNGP02.phx.gbl. ..
wanwan wrote:
>I wrote a class and have objects from this class added to an
arraylist. When I retrieve the objects from the arraylist, should I
use ctype or directcast to cast them back to the original class.?
As you want to cast the reference, not covert the object, you should use
DirectCast.
If you use framework 2.0, you can use a generic list instead of the
ArrayList, then you don't need the cast.
--
Göran Andersson
_____
http://www.guffa.com
Could you write that in a sentence that makes sense?
Did I misinterpret anything? Before or after what? What documentation?
What is it that casting is faster than?
Michel Posseth [MCP] wrote:
Hello
>If you use framework 2.0, you can use a generic list instead of the
ArrayList, then you don't need the cast.
Before you misinterpreted this as "faster" by documentation yes however
in practice casting is faster
regards
michel
"Göran Andersson" <gu***@guffa.co mschreef in bericht
news:%2******** ********@TK2MSF TNGP02.phx.gbl. ..
>wanwan wrote:
>>I wrote a class and have objects from this class added to an
arraylist. When I retrieve the objects from the arraylist, should I
use ctype or directcast to cast them back to the original class.?
As you want to cast the reference, not covert the object, you should use
DirectCast.
If you use framework 2.0, you can use a generic list instead of the
ArrayList, then you don't need the cast.
--
Göran Andersson
_____
http://www.guffa.com
--
Göran Andersson
_____ http://www.guffa.com
On Feb 17, 9:49 am, Göran Andersson <g...@guffa.com wrote:
Could you write that in a sentence that makes sense?
Did I misinterpret anything? Before or after what? What documentation?
What is it that casting is faster than?
Michel Posseth [MCP] wrote:
Hello
If you use framework 2.0, you can use a generic list instead of the
ArrayList, then you don't need the cast.
Before you misinterpreted this as "faster" by documentation yes however
in practice casting is faster
regards
michel
"Göran Andersson" <g...@guffa.com schreef in bericht
news:%2******** ********@TK2MSF TNGP02.phx.gbl. ..
wanwan wrote:
I wrote a class and have objects from this class added to an
arraylist. When I retrieve the objects from the arraylist, should I
use ctype or directcast to cast them back to the original class.?
As you want to cast the reference, not covert the object, you should use
DirectCast.
If you use framework 2.0, you can use a generic list instead of the
ArrayList, then you don't need the cast.
--
Göran Andersson
_____
http://www.guffa.com
--
Göran Andersson
_____http://www.guffa.com
I can't find an example of syntax for writing an arraylist as a
generic list. Can I please have an example?
wanwan,
Instead of this:
Dim myList As New ArrayList
do this:
Dim myList As New List (Of myClass)
Kerry Moorman
"wanwan" wrote:
On Feb 17, 9:49 am, Göran Andersson <g...@guffa.com wrote:
Could you write that in a sentence that makes sense?
Did I misinterpret anything? Before or after what? What documentation?
What is it that casting is faster than?
Michel Posseth [MCP] wrote:
Hello
>If you use framework 2.0, you can use a generic list instead of the
>ArrayList, then you don't need the cast.
Before you misinterpreted this as "faster" by documentation yes however
in practice casting is faster
regards
michel
"Göran Andersson" <g...@guffa.com schreef in bericht
>news:%2******* *********@TK2MS FTNGP02.phx.gbl ...
>wanwan wrote:
>>I wrote a class and have objects from this class added to an
>>arraylist. When I retrieve the objects from the arraylist, should I
>>use ctype or directcast to cast them back to the original class.?
>As you want to cast the reference, not covert the object, you should use
>DirectCast.
>If you use framework 2.0, you can use a generic list instead of the
>ArrayList, then you don't need the cast.
>--
>Göran Andersson
>_____
>>http://www.guffa.com
--
Göran Andersson
_____http://www.guffa.com
I can't find an example of syntax for writing an arraylist as a
generic list. Can I please have an example?
Personally I'd use DirectCast but Stephany has given the best advice.
Rather than wonder stuff and rather than reading unsubstantiated opinions
from strangers who speculate on everything... do us a favor and run a short
test. Construct loops using CType and DirectCast long enough to produce
meaningful results and post a short version of the code and the times you
generate here.
First everybody gets a little smarter for the exercise, second we have facts
rather than opinions and third each of us can test the code on our own
machines if we feel like confirming the results. Basing our opinions on
facts isn't a bad thing. :-)
"wanwan" <er*******@yaho o.comwrote in message
news:11******** **************@ q2g2000cwa.goog legroups.com...
>I wrote a class and have objects from this class added to an
arraylist. When I retrieve the objects from the arraylist, should I
use ctype or directcast to cast them back to the original class.?
wanwan wrote:
I wrote a class and have objects from this class added to an
arraylist. When I retrieve the objects from the arraylist, should I
use ctype or directcast to cast them back to the original class.?
Maybe you want to check on a somewhat authoritative opinion:
DirectCast revealed
<http://www.panopticonc entral.net/archive/2003/07/10/149.aspx>
HTH.
Regards,
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