title: How can I merge TypedArrays in JavaScript?
body: <p>I'd like to merge multiple arraybuffers to create a Blob. however, as you know,
   <a href="https://developer.mozilla.org/en-US/docs/JavaScript/Typed_arrays/Int8Array" rel="noreferrer">TypedArray</a> dosen't have "push" or useful methods...</p>
  
  <p>E.g.:</p>
  
  <pre><code>var a = new Int8Array( [ 1, 2, 3 ] );
  var b = new Int8Array( [ 4, 5, 6 ] );
  </code></pre>
  
  <p>As a result, I'd like to get <code>[ 1, 2, 3, 4, 5, 6 ]</code>.</p>