Inventing a programming language which doesn't use the Oxford comma. You call a function like foo(1, 2 and 3)

@else Some Lisp languages like Clojure treat commas like white space, and ignore them. So (foo 1, 2 3) (foo 1, 2, 3) and (foo 1 2 3) are all equally valid. The no-commas version is idiomatic. Same is true for associative arrays (maps) {:foo 1 :bar 2} works, as does {:foo 1, :bar 2}
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