And ensime for Scala. The idea is at least as old as SLIME, which has been the defacto common lisp mode for Emacs for ages. When I was using it nearly fifteen

And ensime for Scala. The idea is at least as old as SLIME, which has been the defacto common lisp mode for Emacs for ages. When I was using it nearly fifteen years back it was easily the most comfortable development environment I had used in any language.