This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
I guess it means that many operations with some classes (in the java.util, this classes have to do with collections) state their performance, some spend constant time in searching, others, this time increases with the size of the collection!!!