Qt Functional
How C++ lambda expressions can improve your Qt code
Qt: Functional Programming in C++: Why?
A practical introduction to functional programming

YouTube

QtWS15- Reactive programming and Qt, Ivan Cukic, KDE
Functional C++ for Fun and Profit by Phil Nash
Why Isn’t Functional Programming the Norm? – Richard Feldman
Functional Programming using C++, (Playlist, Teaser to Udemy)
Anjana Vakil: Functional Programming mit JavaScript lernen – JSUnconf 2016
Anjana Vakil – Programming across paradigms

Udemy

Functional Programming using C++, Write more robust and easier to maintain C++ code than ever before.