Thank you very much Henry, David, and Vincent. I think, I must go back to the
basic of reference counting. Special thanks to David for the detail explanation.
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On 28 April 2010 05:33, Bihar Anwar wrote:
> I've tried to use Move() instead of Copy(). Any objection with the following
> code?
>
> var
> a: array of string;
>
> SetLength(a, 5);
> a[0] := 'aa'; a[1] := 'bb'; a[2] := 'cc'; a[3] := 'dd'; a[4] := 'ee';
>
> System.Move(a[3], a[0], 2 * SizeOf(stri
Vincent Snijders wrote:
> Bihar Anwar schreef:
> > I've tried to use Move() instead of Copy(). Any objection with the following
> > code?
>
> Yes, at first glance without much thinking, I don't think it is safe. Did you
> think through the consequences of copying reference counted types (ansistrin
On 28 April 2010 04:24, Bihar Anwar wrote:
> Ok, I'll try to observe the compiled code using debugger and benchmark it if
> needed. BTW, what do you mean by allocating memory directly? Is there another
> way to allocate memory for dynamic array besides using SetLength()?
I meant using allocmem,
Bihar Anwar schreef:
I've tried to use Move() instead of Copy(). Any objection with the following
code?
Yes, at first glance without much thinking, I don't think it is safe. Did you think
through the consequences of copying reference counted types (ansistring in this case
presumably)?
v
) );// instead of a := Copy(a, 3,
2);
SetLength(a, 2);
- Original Message
From: dmitry boyarintsev
To: FPC-Pascal users discussions
Sent: Wed, April 28, 2010 10:31:09 AM
Subject: Re: [fpc-pascal] Question about Deleting elements in Dynamic Array
On Wed, Apr 28, 2010 at 7:2
On Wed, Apr 28, 2010 at 7:24 AM, Bihar Anwar wrote:
> Ok, I'll try to observe the compiled code using debugger and benchmark it if
> needed. BTW, what do you mean by allocating memory directly? Is there another
> way to allocate memory for dynamic array besides using SetLength()?
Copy() (from t
users discussions
Sent: Wed, April 28, 2010 4:12:26 AM
Subject: Re: [fpc-pascal] Question about Deleting elements in Dynamic Array
On 27 April 2010 18:34, Bihar Anwar wrote:
>
> Would Move() be faster, instead of Copy()?
I guess so, have you tried to benchmark? If you really need speed,
wh
On 27 April 2010 18:34, Bihar Anwar wrote:
>
> Would Move() be faster, instead of Copy()?
I guess so, have you tried to benchmark? If you really need speed,
why don't you allocate the memory directly?
Henry
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- Original Message
From: Henry Vermaak
To: FPC-Pascal users discussions
Sent: Tue, April 27, 2010 10:19:45 PM
>I think the right way to do this is:
>a := copy(a, 3, length(a) - 3);
>Presumably copy optimizes this adequately.
Henry
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Would
On 27 April 2010 14:42, Bihar Anwar wrote:
> Just say, I have a dynamic array with size=5, and I want to delete elements
> from the index 0 to 2. Is there a trick (the fastest way) to delete those
> elements (0 to 2) without moving activities?
>
> I've tried to make the dynamic array just pointi
On Tue, Apr 27, 2010 at 5:42 PM, Bihar Anwar wrote:
> Just say, I have a dynamic array with size=5, and I want to delete elements
> from the index 0 to 2. Is there a trick (the fastest way) to delete those
> elements (0 to 2) without moving activities?
You won't do it faster than this:
var
a:
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