Stable proc macros! Nicer namespaces! Many nice new features in Rust 1.30:
miniblog.
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As a kid I didn't particularly like bosses in games: they were a bother that you couldn't skip. Now, I see so many bosses with *amazing* designs.
I think I'm just less intimidated. Platformers also let you wait until you're ready more often too.
Playing with Zellij this week (a terminal multiplexer like screen/tmux) and it's worked great so far.
It's nice having many short-lived, named terminal sessions on a remote machine. Normally I'd have multiple iTerm windows, but they end up with huge histories.
LLVM's lit tool for testing files is the most successful testing DSL I've ever seen. It's used a decent number of projects outside of LLVM.
By contrast I don't see many folks using e.g. Cucumber these days.