A love letter to s7 Scheme https://carloscarrasco.com/a-love-letter-to-s7-scheme.html (Clojure-style datatype-in-fn-position, setf, and some wild environment munging!)
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Elegant code search for literals in Cuis Smalltalk: https://www.youtube.com/watch?v=7mRwtRvw5Vo
You can search for e.g. the literal 1, a literal expression 5-1, or a datatype literal 1@2. Really nice demonstration of AST search.
I rather like the fs.readFileSync API in node. It gives you a buffer, unless you specify a text encoding.
This gently encourages users to think about their encoding, without having a heavyweight unicode datatype.
Interestingly, Rust will be adding a C-style untagged union datatype: