[Year 12 SofDev] MC

[Andrew Shortell]

Yes but...

Unless you have deliberately removed the 10 it is still there ‹ somewhere.
The pointer no longer points to it; the links no longer link to it etc.  in
this Q the pointer no longer points to it.

But unless you have deliberately removed it from the computer all together
it is there. Where else could it have gone?

Remember that a pop only COPIES the thing out of RAM ---- cut is not the
thing here ‹ cut is a copy and then a delete from old position. This is a
POP and so it just copies. There is no other actual action in the pure sense
of it

Also remember that this is a theory question. It CANNOT be too program
orientated because different people teach with different software.

Andrew Shortell

-- 
Andrew Shortell

mailto:shortell at get2me.net
Leaving the 
Heidelberg Teaching Unit at the end of 2011
Ph 9470 3403
Fax  9470 3215



On 22/11/11 10:55 AM, "Poultney, Gordon A"
<Poultney.Gordon.A at edumail.vic.gov.au> wrote:

> I'm still not convinced Adrian, but am open...
> 
> The questions states " which of the following is the correct stack at the end
> of the 3 operations"
>  Is the '10' still on the stack? Not really because the reference to it has
> ahhh 'moved on'. 
> If you were to take a snapshot (say value printout) of the stack at this time,
> the 10 is no longer accessible surely?
> Please correct me if i'm wrong in this?
> 
> This reminds of the old argument about the tree falling in the forest and
> whether there is any sound if there is no-one around to hear it fall!
> cheers
>                gordon
> 
> 
> 
> -----------
> Gordon Poultney
> Horsham College
> 
> From: sofdev-bounces at edulists.com.au [sofdev-bounces at edulists.com.au] on
> behalf of Adrian Janson [janson.adrian.a at edumail.vic.gov.au]
> Sent: Tuesday, 22 November 2011 9:32 AM
> To: 'Year 12 Software Development Teachers' Mailing List'
> Subject: Re: [Year 12 SofDev] MC
> 
> Hi everyone,
>  
> My 2c now!
>  
> I disagree with this view ­ we are discussing a stack implementation in a 1-D
> array and in such a case, a stack will work in exactly this way.  Isn¹t this
> the way that we all taught it?  VB.Net has an inbuilt stack data structure and
> I certainly made use of it ­ but only after I taught my class how to implement
> a stack in a 1-D array.  I am interested to hear how others taught it ­ I just
> felt that if I used the Œstack¹ data structure that the understanding of my
> class would have been minimal.  I first taught them how a stack worked, then
> asked them to write a push and pop algorithm using a 1-D array, which we then
> coded ­ and after we had completed all of these ­ I showed them the Œstack¹
> data structure in VB.Net.
>  
> Is this what others are doing or am I way off base?
>  
> Cheers,
> Adrian
>  
> Adrian Janson B.Sc, Dip.Ed, M.Ed
> Director of ICT
> Melbourne High School, Forrest Hill, South Yarra, Victoria 3141 Australia.
> Phone: 03 9826 0711 International: +61 3 9826 0711
> Fax: 03 9826 8767 International: +61 3 9826 8767
> E-mail: janson.adrian.a at edumail.vic.gov.au <UrlBlockedError.aspx>
> Website: http://www.mhs.vic.edu.au <http://www.mhs.vic.edu.au/>
> Blog: http://jansona.edublogs.org <http://jansona.edublogs.org/>
>  
>  
>  
>  
> 
> From: sofdev-bounces at edulists.com.au [mailto:sofdev-bounces at edulists.com.au]
> On Behalf Of Andrew Shortell
> Sent: Tuesday, 22 November 2011 8:49 AM
> To: Year 12 Software Development Teachers' Mailing List
> Subject: Re: [Year 12 SofDev] MC
>  
> Hi all (you too K)
> 
> Older members of the list might remember back a long time ago when we were
> taught programming.
> 
> This way of doing is how it was taught way back then. It made perfect sense to
> me. (yes I am 53+ !!  ;-)
> 
> Modern programming languages do not have to be so parsimonious with RAM and
> processor speed thus the implementation nowadays is not so old fashioned.
> 
> Perhaps this is one of those times when making the effort to understand the
> exam setting panel makes sense (many of you know my preaching about that so no
> more on it now and NO I am not on the panel). Clearly the hard core programmer
> on the panel learnt theory back then... (or was taught by someone who learnt
> the theory back then.....! )
> 
> Off my soapbox and back to work
> I need to start packing my gear soon as I am off to a new school in 2012
> Very exciting
> 
> Andrew

-- 

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