[Year 12 SofDev] U4O1 - Coding help

[PIKE Philip]

To delete an item from an array, I find the simplest way is as follows.

1.      Search for the item and record the index of that item in the array, say found_index

2.      Overwrite the item at found_index with the last item in the array. IE order(found_index) = order(num_items). Assume num_items is the number of items on the order array

3.      Reduce num_items by 1




[cid:bmglogo73b1ca8]

Philip Pike
Director of ICT

Bacchus Marsh Grammar
T. 03 5366 4893  F. 03 5366 4850
E. pikep at bmg.vic.edu.au  W. http://www.bmg.vic.edu.au
South Maddingley Road | PO Box 214 | Bacchus Marsh Victoria 3340


From: sofdev-bounces at edulists.com.au [mailto:sofdev-bounces at edulists.com.au] On Behalf Of Langham, Peter P
Sent: Wednesday, 17 July 2013 1:00 PM
To: Year 12 Software Development Teachers' Mailing List
Subject: [Year 12 SofDev] U4O1 - Coding help

Good afternoon,

I've been working on the Trentham Spud Inn case study available on edulists, created by Elizabeth Wells, as a guide and as practice material for my teaching for U4O1.

In short, it's a Pizza Restaurant ordering system that requires the following tasks:


-        Allow the waiter/waitress to enter the table's order

-        Allow the waiter/waitress to confirm the order with the diners at the table - removing or adding any requested items.

-        Allow special requests to be appended to the order or to individual dishes.

-        Save all of the collected data into a text file

What is the best way to remove an item from the order?

I've been treating the order as one large string, where the diners may place an order as follows:

String Order = "1 x Spudtastic, 1 x Butternut Pumpkin and fresh figs, 1 x Chicken breast and white truffle oil"

I think I'll use a splitting function to separate the string at each comma so we'd end up with

String Order[0] = 1 x Spudtastic
String Order[1] = 1 x Butternut Pumpkin and fresh figs
String Order[2] = 1 x Chicken breast and white truffle oil

To remove the Butternut Pumpkin and fresh figs order

String Order[1] = String Order[2]
String Order[2] = Null or ""

Is there a better way to do this?

Thanks

Peter Langham
Narre Warren South P12



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