What does "i = +i" mean in Javascript?
<p>In jquery source:</p>

<pre><code>eq: function( i ) {
    i = +i;
    return i === -1 ?
        this.slice( i ) :
        this.slice( i, i + 1 );
},
</code></pre>

<p>Is it used for make sure parse i to int?</p>
