[jawsscripts] Re: Resizing arrays
- From: Andrew Hart <ahart@xxxxxxxxxxxxx>
- To: jawsscripts@xxxxxxxxxxxxx
- Date: Thu, 05 Jan 2012 17:44:22 -0300
On 5/01/2012 4:55 PM, Doug Lee wrote:
> A couple clarifications:
>
> First, to me at least, a "deep copy" is a full duplication of
> something with all subparts. My understanding of "s2 = s1" where they
> are arrays is that, in JAWS, only the pointer is copied. It still
> works for your usage though, so this is mostly just behind-the-scenes
> stuff for this case.
No. Assigning one array to another is truly a deep copy in JAWS script.
I have tested this by making a copy and overwriting the original.
Afterwards, I still had access to the original array in the form of my
copy,as well as the new array I had created.
Please feel free to test it for yourself. It would be great to have
Coroboration from others.
> Second though, your code assumes array sizes, and most of my cases
> don't have a clue in advance what size to use. As an example, consider
> code that creates a structure of information for each entry in a chat
> window. If the process of counting entries is as expensive as that for
> actually retrieving them, there's no reasonable way to know in advance
> how big to make the array. A collection becomes more efficient in this
> case, because it is dynamic while still being amenable to random
> access.
No argument here Doug. Collections have their advantages. My comment
was in response to Travis's requirements.
Cheers,
Andrew.
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