I've taken an interest in functional program over the past year or so, and, more specifically, the sweet spot that balances functional with object-oriented. As part of that, I've been looking at the functional capabilities that have been added to what you might normally think of as imperative languages. C++ has had at least some form of functional programming for along time in its ability to use function pointers and call operators. Lambdas are a more recent addition to the language, and I've been using them more frequently when I define my own APIs.

The more I use the FP aspects of C++, the more I have come to value it as a legitimate tool in the toolbox.