Emacs keybinding of the day: C-x C-x, bound to exchange-point-and-mark. Moves point to the other end of selection ('region' in Emacs terms).
miniblog.
Related Posts
Programming languages differ massively in the range of numeric types they offer.
For example, Rust has an extensive selection, targeting machine word sizes and FP hardware (isize, i32, f64) plus unsigned variants.
Emacs is Sexy: https://emacs.sexy/
A great selection of introductory material for new Emacsers.
A great selection of incremental search (isearch) tips on /r/emacs: