How do I fill an array with binary data streaming from websocket

I got a continuous stream of byte data receiving from websocket. When I view the data with this function:

document.getElementById('log').innerHTML = document.getElementById('log').innerHTML + msg + "<br />";

It would look like this:

-0.00005645785104823496
0.00000906544783255643
-0.001234972515485563
0.00000008534781277461
.
.
.

I want to fill it in an array that would look like

var inp = new Array(event.data)
  , arr = new Float32Array()
  ;
for(var i = 0;i <arr.length; i++) {
    arr[i] = inp[i];
}

How do I fill the inp[i] array with data receiving from websocket.

Thanks