Array of pointers
in [Visual Basic]
|
From: Eduardo on 13 Oct 2009 10:59 dpb escribi�: > I don't recall VB ever barfing or returning wrong/unexpected results in > my usage. I don't recall either. And I can't find the post (so far).
From: Schmidt on 13 Oct 2009 12:19 "Eduardo" <mm(a)mm.com> schrieb im Newsbeitrag news:hb1sfn$38g$1(a)aioe.org... > One thing: I've read somewhere (I think it was Ken Halter > who said that here in the NG) that working with the return > value in a function was dangerous because it could cause problems. So far I'm using that kind of "direct-placement in return-values" quite often - it is (especially with String-returning-function, which interact directly with API-Calls) mostly faster, avoiding extra-allocations and extra-copies of VBs heap-allocated variable-types - no surprises so far here. Though (not sure about Kens advises)... I placed something like a "warning" some time ago here in the NG - with regards to "fast String-Functions" that deal directly on passed ByteBuffers or Pointers - and (for speed-reasons) involve the SysAllocStringByteLen-API. This API is able to avoid explicit preallocation of the String- Destination-Buffers, normally done beforehand with the "more conventional" Space$(...) function - it can do all that (allocation and copy-over) in "one go". But this API, although working stable for a long time, behaves not that reliable anymore (at least in conjunction with VB-BSTR-Code) on todays Win-OSes (maybe due to a servicepack, or whatever). I suspect the OLEAut-String-Caching, which seems to work a bit different now on todays OSes, but not sure. But the outlined explicit prealloc over Space$(...), followed by a CopyMemory-call for the copy-over is only about 10-15% slower than SysAllocStringByteLen - so, not all that much of a loss. Olaf
From: samiah banaag on 25 Oct 2009 10:00 Good eve... Please help me naman oh for a simple game using either array, stacks, queue or link lists... Even a simple game can do.... please........ *** Sent via Developersdex http://www.developersdex.com ***
From: Larry Serflaten on 25 Oct 2009 19:26
"samiah banaag" <braverly_samiah(a)yahoo.com> wrote > Good eve... > > Please help me naman oh for a simple game using either array, stacks, > queue or link lists... Even a simple game can do.... > please........ Search google: Towers of Hanoi LFS |