The point was not "Coffeescript is better than Clojure", it was "destructuring assignment (like in Coffeescript, for instance) is a better solution than the one proposed in the post". If Clojure has sophisticated destructuring assignment, awesome. Use that instead.

I suppose I failed to see how destructuring assignment on hash-maps accomplishes anything interesting at all related to the post. The post eliminates hash-maps altogether.

It eliminates them from the api, but how does memoize work? There are still hashtables, you just never get a hook on them.

I'm just saying that I prefer having that hook, and that destructuring assignment lets me do so with brevity and clarity.