Opaque types in JavaScript: https://codemix.com/opaque-types-in-javascript/
Shows a nice compromise between wrapper types (stronger type guarantees) and primitive types (lots of functions already defined on the type).
miniblog.
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How to Write Seemingly Unhygienic and Referentially
Opaque Macros with Syntax-rules: a fun paper on macros in Scheme, and how you can subvert hygiene using only syntax-rules!
TIL XEmacs has more datatypes! For example, a keymap is an opaque type rather than a list:
How to Write Seemingly Unhygienic and Referentially Opaque Macros with
Syntax-rules http://t.co/zMetrJ0hyA