Split a string using a regex : <p>I would like to split the following str into an array that has 2 elements, the first being 'Some words in a sentence', the second being 'ABC' where ABC can be any upper case character.</p>

<pre><code>const str = 'Some words in a sentence (ABC)';
const regex = ?
const arr = str.split(regex);
...
expect(arr[0]).to.eq('Some words in a sentence');
expect(arr[1]).to.eq('ABC');
expect(arr.length).to.eq(2);
</code></pre>

<p>Any thoughts would be appreciated.</p>

<p>Cheers,</p>

<p>Paul</p>
