[Javascript] Re: While statement array losing data

[twlewis at softhome.net (Tim Lewis)]

So JScript passes the actual data instead of a pointer to it?


> On 17 May 2007, at 14:15:22, Tim Lewis wrote:
>
>> I finally found my problem.  Apparently if an array item is
>> populated with
>> a numeric value, the value gets lost after leaving the While loop.  A
>> string is preserved.  I changed the code to change the integer to a
>> string:
>> sLineIn[iResultCount] = sTransCount+"";
>> It works now.
>>
>
> Your reply overlapped with my reply to your original question :-)
>
> However, the stuff in my previous reply is still relevant. What
> happens when you do the above is that JScript will try to add the
> empty string to whatever is referenced by sTransCount, find that the
> referenced thing is a COM object, and convert it to a JScript string
> by taking its default (in this case "Value") property (as I described
> previously). So it's the same thing as using the default property of
> the Field object, as VBScript does by default.
>
> If you're working with COM objects such as ADO RecordSets and
> associated objects, it's worth understanding the difference between
> them and JScript objects - the difference doesn't arise in VBScript,
> as that is also "built out of COM", but JScript (which is at heart a
> COM component) adds some of its own behaviours, and removes or masks
> others.
>
> There's an article mentioning one of the differences at Eric
> Lippert's blog - he's the guy who wrote VBscript and was involved in
> writing JScript:
> <http://blogs.msdn.com/ericlippert/archive/2003/09/15/53005.aspx>
> with links to more information.
>
> Regards,
>
> Nick.
> --
> Nick Fitzsimons
> http://www.nickfitz.co.uk/
>
>
>
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