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> It's nice that most of Janes the literals match Clojure

Two things:

* Janet doesn't have a built-in set data structure literal. Need to use a library for that.

* Janet has mutable and immutable versions of arrays and hashmaps (the literals for the mutable variety are prefixed with `@`)

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I was surprised to discover that Janet tuples and records (the immutable array and hashmap you've mentioned) aren't the Clojure-style immutable which is designed for cheap updates, but the more usual kind of immutable where if you want a copy with changed data, you have to make a copy with changed data.

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