Answers I'm most proud of:

• Haskell
  • Elegant way to combine multiple filtering functions in Haskell
• C++
  • How to pass a rvalue reference parameter to a template operator() function in C++?; turned out to be an in-depth walkthrough of this code for currying functions taken from Functional Programming in C++.
  • What's the difference between std::move and std::forward; the question was almost 9 years old when I answered, but I think my explanation is damn clear
  • How do I display the contents of a std::vector of my own datatype and display the name on the console using std::copy?
  • decltype on the variable of reference type with curly braces, downvoted by a couple of arrogant people who don't know what template/auto type deduction is.
  • What is calling void(); doing?
  • What exactly is decltype(std::get<0>(tup))?
• bash, awk, sed, ...
  • How do I edit current shell command without executing it?
  • How to make git-log scroll up instead of down (solution with Sed)
  • How to sort a file by line length and then alphabetically for the second key? with a very interesting quirk about sort, which was simultaneously investigated with this question of mine

Try WinZoZ

which is my very first Vim plug-in for easy window movement and resizing.