Elixir 1.6 introduces a code autoformatter, reformats the entire stdlib, and adds an elegant pattern match syntax for defining breakpoints!
miniblog.
Related Posts
https://www.youtube.com/watch?v=0DLdQ6yb7h8 is a really accessible introduction to programming workflows with Sly for Common Lisp.
The notion of 'stickers' is novel to me: you mark places in the code where you want to remember values (essentially tracing) or pop to a debugger (breakpoints).
Debuggers actually set breakpoints after the function prologue, but reliably identifying the prologue across compilers and optimisation levels is hard!
python-django.el lets you do `manage.py runserver` inside Emacs. You can then set breakpoints and follow the code inside Emacs. Awesome.