I've used many version control systems, but this week has been the first time I've used Mercurial for anything more than a bit of testing. It looks good to me, so I read a bit around to see how people are using it in their projects, and I came accross Lajos Kamocsay's post about how he includes Mercurials branch and revision information in his Xcode projects that I think deserves a shout-out.

When updating an Address Book record in Cocoa, I read that I had modify the record using ABRecordSetValue(). But it wouldn't change. Even if I called ABAddressBookSave() afterwards, it just wouldn't change. It turns out I had to call ABAddressBookAddRecord() also. There is no ABAddressBookUpdateRecord(), but it turns out that the ABAddressBookAddRecord function does the same. I expected that it would give me a duplicate record, but it does not, it updates the existing record. Glad to have that sorted out, I hope this helps you as well.

I'm sorry if this is all over the net today, but I really find this a great info graphic, by Noodlor. I link directly to his graphic:

So Google's admitted that Android is not open source. Some parts are, some parts are not. That's the same with iOS. Many parts of iOS are from open source projects (I'll mention cups, the printer stack on many Linux systems, that is very much supported by Apple, even though it's GPL). Heck, even Microsoft Windows has components from open source projects (the ftp client being my favourite example). To me, it's not so much about these projects being open source, as what do they give back to the open source projects.

The kernel and userland of both OS X and iOS is based on various ...

I hate instant messaging. Not because I don't like talking to people, but because there are so many networks I have to be part of, and once I'm signed up I have to use this program or that program, which means I have to have a ton of programs running, or I can wait a while and get a program that does a half decent job at implementing many different networks and then have a few more programs running to open what that program doesn't support. So I log off, and never log back in again. I would really like to use IM, I would really like to be more available that way, but it's such a hassle.

That's why I have big hopes for iMessage. If Apple were to open iMessage for extension, the providers of the IM networks themselves could extend it to support their network. Then I could have all the chats in one place, and be signed ...