How to find location within list?
<p>I suspect this is a basic question(but I tried to google and search SO with no luck). </p>

<p>I have a list: <code>[1, 2,3,4]</code></p>

<p>and I want to know where in the list the value of 3 is..but without using a for loop to go through the entire list.  Is that possible?  I'm already going through a very large list and want to minimize the number of loops through the entire list. </p>

<p>Is this possible?</p>
