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PO
 

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    <p>Well you have only two actions in your code, but much too many conditions. Use a single if-else-statement, and boolean operators in the condition. If that was impossible, you could at least</p> <ul> <li>remove the empty lines to get the full logic on one screen page</li> <li>add some comments on what the branches are doing (and why)</li> <li>avoid early returns</li> </ul> <p>Here's your function simplified:</p> <pre><code>var duration = +new Date() - start.time, isPastHalf = Number(duration) &lt; 250 &amp;&amp; Math.abs(delta.x) &gt; 20 || Math.abs(delta.x) &gt; viewport / 2, isFarRight = this.content.getBoundingClientRect().left &gt; viewport / 2, direction = delta.x &lt; 0; if (!isScrolling) { if (isPastHalf) { if (direction) this.close(); else { if (isFarRight &amp;&amp; pulled) this.close(); else this.open(); } } else { if (isFarRight) { // Looks like the opposite of `direction`, is it? if (this.isEmpty(delta) || delta.x &gt; 0) this.close(); else this.open(); } else this.close(); } } </code></pre> <p>and shortened:</p> <pre><code>var duration = +new Date() - start.time, isPastHalf = Number(duration) &lt; 250 &amp;&amp; Math.abs(delta.x) &gt; 20 || Math.abs(delta.x) &gt; viewport / 2, isFarRight = this.content.getBoundingClientRect().left &gt; viewport / 2, direction = delta.x &lt; 0, undirection = this.isEmpty(delta) || delta.x &gt; 0; if (!isScrolling) { if ( isPastHalf &amp;&amp; ! direction &amp;&amp; !(isFarRight &amp;&amp; pulled) || !isPastHalf &amp;&amp; !undirection &amp;&amp; isFarRight ) this.open(); else this.close(); } </code></pre>
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    1. POhow could I reduce the cyclomatic complexity?
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    1. COWhat about cyclomatic complexity on `switch` statements, if I'd have something like [this](http://snippi.com/s/nkafrv9) what could I do ? I don't think there's much I can do, or can I ?
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    2. COThere's a lot you can do. First of all, you usually would use else-ifs instead of `switch` when you don't need falltrough.
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    3. COBy the way, if you get brainhurt trying to minimize boolean math, cheat and use [wolframalpha](http://www.wolframalpha.com/input/?i=%28a+%26%26+!+b+%26%26+!%28c+%26%26+d%29+||+!a+%26%26+!e+%26%26+c%29)
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