Create a New Array in Clojurescript

Question

When I use [] the expression gets compiled to cljs.core.PersistentVector.EMPTY which looks like all expressions of [] map to the same object.

I've read that I shouldn't use new Array(). Is that still worth following?

Since I'm going to call aset on this Array, I need a new object with each call. How would I do that?

Probably with some code even if it is JS we can help you see the idiomatic way in clojurescript better — Joaquin
– Joaquin, Commented Feb 27, 2014 at 9:31

yonki · Accepted Answer · 2014-03-04 23:46:19Z

7

There’s pretty neat notation in ClojureScript nowadays. You can just type #js [] and compiler will treat it as native JS array. Works with objects too, like so: #js {:one 1 :two 2}. Such thing will be compiled to bare JS object.

answered Mar 4, 2014 at 23:46

yonki

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dnolen · Accepted Answer · 2014-02-27 02:23:24Z

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Unless you are doing JavaScript interop you should just use persistent vectors. If you really need to make an array you can do so with (array).

answered Feb 27, 2014 at 2:23

dnolen

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