What is this ==- javascript operator?
<p>I was stumbling around trying different conditions, when I discovered <code>==-</code>, or <code>==+</code>.</p>

<p>In a JS console, you can write:</p>

<pre><code>var a = " ";
</code></pre>

<p>then the following is true</p>

<pre><code>a == " ";
</code></pre>

<p>but this is false</p>

<pre><code>a == "    ";
</code></pre>

<p>However, it will be true if you say:</p>

<pre><code>a ==- "   ";
</code></pre>

<p>or </p>

<pre><code>a ==+ "   ";
</code></pre>

<p>So what is this nifty <code>==-</code> operator?</p>
