removing non-numeric characters from a string
<pre><code>strings = ["1 asdf 2", "25etrth", "2234342 awefiasd"] #and so on
</code></pre>

<p>Which is the easiest way to get <code>[1, 25, 2234342]</code>?</p>

<p>How can this be done without a regex module or expression like <code>(^[0-9]+)</code>?</p>
