js data processing in cljs

test.cljs

(let [old-arr #js []
      new-arr #js []]
  (doseq [val old-arr]
    (when (should-include? val)
      (.push new-arr val))))

test.js

var oldArr = []; // <-- original data to be processed
var newArr = [];
for (i=0; i<oldArr.length; i++) {
 var val = oldArr[i];
 if (shouldInclude(val)) { // <-- basic filter
  newArr.push = transform(val); // <-- basic map
 }
}