This piece of news is a week old now but I somehow didn’t notice until today: LGPL License Option Added to Qt
Or: web killed the paper star?
From The 2008 Media Inflection: Meet Dr. Web, the New Gorilla by Herb Sutter:
- As of January 2009: PC Magazine is going “digital only.” After the January issue, the print magazine will disappear. Instead, the content will appear exclusively on the web.
- As of January 2009: Dr. Dobb’s Journal is permanently suspending print publication and going web-only. Some of the content will be available as a new “Dr. Dobb’s Report” section of InformationWeek.
Or: Old year, new bugs
Or: Bug of the week number
Or: It is the first week of 2009, but it is still 2008
We all know that date calculation is tricky. Don’t get me started on time zones! I’ve found a web-based time report application and an online movie rental site that fails to handle a wonderful corner case taking place right now, in the last days of year 2008.
Week numbers are used very often in Sweden, and of course they need calculation too. There is fortunately an ISO standard (mandatory Wikipedia link) that defines week 1 to be the the week with the year’s first Thursday in it. This is also the first week with four or more days in the new year.
This week is obviously week 1 by the above definition, as the first of January is on Thursday (tomorrow). There is also no denying that it we are still in the year 2008. (At least in Europe. Damn time zones!)
Let’s look at a time report application that might as well remain anonymous. By default it shows the current week, except for Monday-Wednesday this week:
(You guessed right: the Swedish word for “week” is “vecka”)
If I press the left arrow to move to the previous week, I get a time report page for week 52, year 2007. The right arrows takes me to the time report page for week 2, 2008. Oups!
An unnamed Swedish movie rental site shows the “New movies in December 2008” with “New this week”, but looking at the actual dates I’m pretty sure that people have been able to rent these movies for a whole year!
I should have started looking for more bugs like this already on Monday, because tomorrow I expect these bugs to be hidden and they will not show again for a few years! In about a year I might look for similar bugs appearing the days when it is the last week of 2009 but the year is 2010.
Happy new year!
It was months since I mentioned the Jeff Atwood and Joel Spolsky joint venture stackoverflow.com on this blog. The stackoverflow.com site has been up and running for a while now, and it is both a great resource for getting help, and a possible way to spend a lot of time online. The reward system is devilishly clever, with points awarded according to certain rules and badges handed out for achievements of various magnitude.
I would like a similar reward system on my site Folkmun, but it will take a while before I get even close…
Learning by example is very useful when programming, and a lot of examples can be found by searching for source code in Google Code Search. Just remember to check the license if you want to copy some existing code!