<p>(<a href="https://play.golang.org/p/6uXcuL3iyF" rel="nofollow">playground link</a>, <a href="https://imgur.com/5YAel8Q" rel="nofollow">screenshot of the result in case it was fixed later</a>)</p>
<p>I tried to match the string <code>"asdf \t\nkkkk"</code> against regexp</p>
<pre><code>`\s*`
</code></pre>
<p>and it doesn't match. But</p>
<pre><code>`\s+`
</code></pre>
<p>works. I think they both should work? Am I holding it wrong?</p>
<hr/>**评论：**<br/><br/>snakeshands: <pre><p>A match is being reported in both cases; the first match of zero-or-more-whitespace-characters occurs at index 0, and is 0 characters long.</p>
<p>When there is no match, FindStringIndex() returns nil, not [0, 0].</p></pre>fishywang: <pre><p>You are right. Thanks.</p></pre>
