Today I learnt that Emacs has a notion of 'permanent' variables! https://www.gnu.org/software/emacs/manual/html_node/elisp/Creating-Buffer_002dLocal.html
These are variables that persist even when you change major mode (which generally resets buffer-local variables).
miniblog.
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Today I learnt about clippy::clone_on_ref_ptr, which complains about t.clone() on a Rc<Thing>. You write Rc::clone(t) instead, so it's obvious it's a cheap clone.
It's a nice approach, because it makes the expensive clones more obvious.
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Rust and RISC-V both feel like they've reached critical mass and I'd guess that they'll be used more in 5 years than they are today.
What other technologies fit this description?
1
Today I learnt about "bypass charging", a phone feature where it can run directly off the mains without using the battery at all. No battery charging, less heat, less battery wear. Nifty.
