Regex for partial match of word? : <p>Is it possible to perform the following match?</p>

<p><code>^do something$</code></p>

<p>.. where matches are possible for a partially typed 'something'.</p>

<p>For example:</p>

<pre><code>^do s$
^do so$
^do som$
^do some$
^do somet$
^do someth$
^do somethi$
^do somethin$
^do something$
</code></pre>

<p>Is it possible to do this with regex without having to string a bunch of logical ORs?</p>
