SOFT6008 Checksum Shopping List

Here's a list of checksum exercises that students should work though:


Euro Banknotes
Credit Card
EAN
PPS Number
Spanish DNI
ISBN-10



Some test cases

IE-PPSN

These numbers are valid in theory
5313197L
1234567T
1234567t
0000000W
0000071w

ES-DNI

These are valid numbers
03457393-X
03457393X
03457393x
03405999-K
70240341-C
70259948-P
70259948p

If these test cases give you trouble read the small print on the ParseInt box!.

I have noticed that in real life Spaniards tend to insert separators between groups of digits to make the DNI number easier to read and it is common to put a dash before the letter (as above). To accommodate this your code should strip out all useless characters from the input before looking at it more closely.

Ensure that your code insists on the correct length
007-X is not valid. But 00000000-X is.

Euro Banknotes

Just take some from your wallet. There are fewer than 26 countries that issue Euro banknotes some some letters never appear at the start of a serial number. Accounting for this would require some very inelegant code. We can't have inelegant code!

Be sure to check some serial numbers that have a zero immediately after the letter. If that gives you trouble ParseInt may be to blame.

SOFT6008 Adding up digits

Adding up all the digits in a number, and then adding those digits up again, until you are left with one, turns out to be the same as doing a MOD 9. Except for 18.

Computationally that's must simpler than extracting and adding digits.

SOFT6008 Class 14 WEB

I gave out a handout of checksums. I asked students to start coding some check digit algorithms for user input validation.Euro banknotes are probably the easiest to start with.

SOFT6007 Class 12 ITM

We looked at classes in CSS. I asked students to colour code their timetables

SOFT6007 Class 16 DWEB

I asked studens to finish off their timetables with colour coded classes.

A number of students are still trying to catch up. We might not be able to wait much longer. This needs to be done and dusted this week.

SOFT6007 Class 15 WEB

I wasn't in for this class

SOFT6007 Class 14 WEB ITM

I talked about prediction markets and the experiment I want students and the experiment I want students to participate in.

It has nothing to do with this module however.

COMP6023 Tuesday's Lab

There will be no COMP6023 Web Publishing class this Tuesday (9 Oct)

SOFT6007 Class 13 DWEB

We looked at classes. I asked student to colour code their timetables

SOFT6008 Class 15 COM

Students continued coding. Some struggled. It's important to build up programs slowly and text as you go. Writing loads of code and then trying to figure out where the problems are takes much longer in the long run.

SOFT6008 Class 14 COM

I gave out a handout on Checksums and asked students to work though them to see how they work. I asked students to start coding some of the. The Euro banknote check digit is probably the easiest one to start with.

SOFT6008 Class 13 WEB COM

We looked at using the DOM to take input from a form, and then modify the contents of the page based on the input


Example: http://mcom.cit.ie/staff/computing/cmanning/soft6008-2012/code/phonenumbers.html

Well made video

SOFT6008 Class 12 WEB COM

We looked at the use of check digits for user input validation.

There's a handout can has a few more from other countries and tips for coding. There's a typo in the handout. myS.indexOf ("o",5) evaluates to 15, not 10 as stated.


More Euro banknote trivia from Wikipedia

SOFT6007 Class 11 ITM

I rushed things a bit because we had fallen behind the other group what with one thing and another.

we looked at how CSS works and I asked students to style the timetable page they built in previous classes.


Examples: Page 7  and CSS

COMP6023 Copyright

Next week we will discuss Copyright in class

Students should sign-up for and take this (free) course
http://www.newsu.org/courses/online-media-law-basics-bloggers-and-other-publish
and report on their exams scores and any interesting ideas they encountered.

SOFT6007 Class 10 ITM

We looked at colspan and rowspan and I asked students modify their timetables to account for double classes.

A number of students left after the first of today's two classes. This is fine. CIT is not a prison.  But if you miss a class it is your responsibility to figure out what went on, and to make up any ground that may have been lost. Mon-Fri 9-6 was what you signed up for.

SOFT6007 Class 09 ITM

I asked students to add me to a circle in Google+

We looked at tables. I asked students to make a html table of their college timetable.

SOFT6007 Class 12 WEB ITM

We looked at digital colour systems. HSB. RGB. Hex.

Many student were unfamiliar with the Hexadecimal system. This rather cool video, that I wish I had made, does a great job of explaining it.

These videos cover much of the same material as today's class and but one was made with actual coffee!

COMP6023 Class 11

I talked about blogs.

We discussed privacy and anonymity. These might be interesting topics for students to consider in their blog posts for Week 03.

slides: comp6023-blogs.pdf

After class as few students asked about plagiarism and TurnItIn. I don't propose to have any further conversations about what is or is not plagiarism. I believe that was covered sufficiently in other modules that students have already taken.