So I've used <I>plenty</I> of STL functions which takes functors as parameters. For calculating set differences, for sorting vectors, etc. I'm in a situation where I'd like to write such a function ...

Here's how to make the jump from simple lines of code to something that's a lot more useful. After reading countless blogs online, purging through hundreds of pages of books, you feel comfortable ...

Read an excerpt from the 4th Edition of the book Python Essential Reference by David Beazley. Excerpt from Python Essential Reference, 4th Edition. Substantial programs are broken up into functions ...