I was looking at code from Mozilla that add a filter method to Array and it had a line of code that confused me.  var len = this.length >>> 0;   I have never seen >>> used in JavaScript before. What is it and what does it do?...
x <<= y  (x = x << y) x >>= y  (x = x >> y) x >>>= y (x = x >>> y) x &= y   (x = x & y) x ^= y   (x = x ^ y) x |= y   (x = x | y)   What do these different operators do?...
I was wondering what the = +_ operator means in JavaScript.  It looks like it does assignments.  Example:  hexbin.radius = function(_) {    if (!arguments.length)        return r;    r = +_;    dx = r * 2 * Math.sin(Math.PI / 3);    dy = r * 1.5;...
I've been working with JavaScript for a few days now and have got to a point where I want to overload operators for my defined objects.  After a stint on google searching for this it seems you can't officially do this, yet there are a few p...
I was playing around in jsfiddle.net and I'm curious as to why this returns true?  if(0 < 5 < 3) {     alert("True"); }   So does this:  if(0 < 5 < 2) {     alert("True"); }   But this doesn't:  if(0 < 5 <...
I came across the following line  hsb.s = max != 0 ? 255 * delta / max : 0;   What do the ? and : mean in this context?...
I've been trying to understand the difference between JavaScript's comparison operators: identity and equality. From what I've read, if you check the equality of two objects using ==, JavaScript will try to figure out if they are the sa...
If you read the comments at the jQuery inArray page here, there's an interesting declaration:  !!~jQuery.inArray(elm, arr)    Now, I believe a double-exclamation point will convert the result to type boolean, with the value of true.  What I don...
I was reading the re-introduction to JavaScript on MDN and in the section Numbers it said that you can convert a string to a number simply by adding a plus operator in front of it.  For example:  +"42" which would yield the number output of...
What's the difference between | and || in Javascript?  Furthermore, what's the difference between & and &&?...

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