To view the wiki-source of any MediaWiki page, add
?action=rawto the URL. (Good for scripting.)
There's a fast, easy way to avoid the agonizing worst-case fragmentation you can get when you use a simple size-class/freelist implementation of
malloc: per-page freelists.
You can implement a copying collector in 100 lines of easy-to-read C that won't blow the stack!
The Encyclopædia Brittanica is about 33,000 pages long, and I'm not the only one to raise an eyebrow at the volume titled “Menage - Ottowa”.
I also keep learning about good decisions the JVM designers made, but they're even less exciting than the above.