[рони]

MrFlatman,

<script>
  "use strict"
function IsSquare(K)
{
   K = Math.sqrt(K);
   return K ==  (K|0)
}
var arr = Array.from({length : 10}, function() {
   return 1 + 100 * Math.random()|0
})
document.write(JSON.stringify(arr))
arr = arr.filter(IsSquare);
document.write(JSON.stringify(arr))
</script>