Welcome to another "Weekly Concerns". This is a post-a-week series of interesting links, relevant to programming and programmers. You can check out previous Weekly Concerns posts in the archive.

• Why Your Previous Developer was Terrible - I tend to lash out emotionally when I see bad code, but I always feel uncomfortable blaming the previous developer, since I have no idea what kind of constraints (personally and professionally) they were working under. It's not always possible, but I try my best to seperate the art from the artist (and the code from the coder).
• Learn CSS Layout is an interesting CSS tutorial, that kinda reminds me of the various koans and git immersion types of tutorial sites.
• Did you see that "Everything from a 1991 Radio Shack ad is now done on your phone" thing making the rounds recently? Here's another analysis of technology costs then and now. Very roughly, the equivalent technology is not the $3000 nominal price in the Radio Shack ad, but at least $3.56 million.
• In MySQL, there's a sometimes handy GROUP_CONCAT function built in. Pete Shearer shows a way to accomplish something similar using FOR XML PATH and Microsoft SQL.

If you have an interesting link that you'd like to see in Weekly Concerns, leave a comment or contact me.