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<p class=MsoPlainText>Hi Guy and all,<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>The definition of array and record are as you stated and
I would have thought that this was a common thing to all languages - but I am
not familiar with PHP at all - and was surprised to see that you could mix data
types in an array! It is important to remember that it is in the study
design (and the next one to) and so is fair game for the examiners (even though
as you said – it would be possibly a controversial topic given the way
PHP treats arrays and records....)<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Cheers,<o:p></o:p></p>
<p class=MsoPlainText>Adrian<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoNormal><b><span style='font-size:18.0pt;font-family:"Times New Roman","serif";
color:#002060'>Adrian Janson </span></b><b><span style='font-size:7.0pt;
font-family:"Times New Roman","serif";color:#002060'>B.Sc, Dip.Ed, M.Ed<br>
</span></b><b><span style='font-size:14.0pt;font-family:"Times New Roman","serif";
color:#002060'>Director of ICT<br>
</span></b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:#244061'>Melbourne High School, Forrest Hill, South Yarra, Victoria 3141
Australia.<br>
Phone: 03 9826 0711 International: +61 3 9826 0711<br>
Fax: 03 9826 8767 International: +61 3 9826 8767<br>
E-mail: <a href="janson.adrian.a@edumail.vic.gov.au"><span style='color:blue'>janson.adrian.a@edumail.vic.gov.au</span></a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:#244061'>Website: <a href="http://www.mhs.vic.edu.au/"><span
style='color:blue'>http://www.mhs.vic.edu.au</span></a></span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:#244061'>Blog: <a href="http://jansona.edublogs.org/" target="_blank"><span
style='color:blue'>http://jansona.edublogs.org</span></a></span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><span lang=EN-US>-----Original Message-----<br>
From: sofdev-bounces@edulists.com.au [mailto:sofdev-bounces@edulists.com.au] On
Behalf Of Guy Flaherty<br>
Sent: Wednesday, 18 August 2010 2:58 PM<br>
To: sofdev@edulists.com.au<br>
Subject: Re: [Year 12 SofDev] Records and Arrays</span></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Laurie,<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>I initially thought exactly as you stated when I looked
at the reference in the book. So I did a quick search and in languages like c
and pascal arrays must be of the same data type and records(pascal)/struct(c)
can have different data types for items, as explained in the text.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Being a python using person myself, I am not used to
this, as arrays can have any type of data in them, and there really isn't a
'record' type in python that I am aware of. I think php is similar.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>It would seem that this kind of structure is language
dependent, and so not the best for an exam question, in my opinion.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Guy Flaherty<o:p></o:p></p>
<p class=MsoPlainText>Xavier College <o:p></o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText>>>> "Laurie Savage"
<savage.john.l@edumail.vic.gov.au> 18/08/10 01:57 PM >>> <o:p></o:p></p>
<p class=MsoPlainText>I have a problem. In Fitzpatrick and Keane p. 161 (and in
the 2007 exam)<o:p></o:p></p>
<p class=MsoPlainText>arrays and records are primarily differentiated by data
type. So the text<o:p></o:p></p>
<p class=MsoPlainText>says: "An array is an indexed collection of elements
of the same type of<o:p></o:p></p>
<p class=MsoPlainText>data"; "A ... record represents a group of
different data elements".<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>But, in PHP, this works:<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><?php <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>$pizzaToppings = array('onion', 'tomato', 'cheese',
'anchovies', 'ham',<o:p></o:p></p>
<p class=MsoPlainText>'pepperoni', 1.6, 200); <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>echo "<h1>We like $pizzaToppings[5]
PIZZA!</h1>";<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>$num = $pizzaToppings[6] * $pizzaToppings[7];<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>echo $num;<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>?><o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>i.e. the array is storing data of different types and not
storing the<o:p></o:p></p>
<p class=MsoPlainText>numeric data as a string. What am I missing here? I've
done a search, but<o:p></o:p></p>
<p class=MsoPlainText>these are the only references I've seen that define this
as the main<o:p></o:p></p>
<p class=MsoPlainText>difference. I've been labouring under the delusion that
an array lives in<o:p></o:p></p>
<p class=MsoPlainText>volatile memory and disappears once the application halts
or reinitialises<o:p></o:p></p>
<p class=MsoPlainText>and a record is written to disk. I know from the web that
I'm not alone<o:p></o:p></p>
<p class=MsoPlainText>here.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Laurie Savage<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Pascoe Vale Girls College<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
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<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Scanned by Sonar. <o:p></o:p></p>
<p class=MsoPlainText>Date: 2010-08-18 14:05:08.466<o:p></o:p></p>
<p class=MsoPlainText>From: sofdev-bounces@edulists.com.au<o:p></o:p></p>
<p class=MsoPlainText>To: g.flaherty@xavier.vic.edu.au<o:p></o:p></p>
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