javascript: triple > - what does it mean [duplicate]

Question

I was searching an indexOf polyfill for IE8, and I found this question. The accepted answer suggests this code:

if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function(elt /*, from*/)
{
var len = this.length >>> 0;

var from = Number(arguments[1]) || 0;
from = (from < 0)
     ? Math.ceil(from)
     : Math.floor(from);
if (from < 0)
  from += len;

for (; from < len; from++)
{
  if (from in this &&
      this[from] === elt)
    return from;
}
return -1;

}; }

I never see before a triple >:

var len = this.length >>> 0;

What is?

Duplicate: stackoverflow.com/questions/7718711/…

teynon
– teynon

2013-06-07 18:49:22 +00:00
Commented Jun 7, 2013 at 18:49 — teynon
– teynon, Commented Jun 7, 2013 at 18:49

antyrat · Accepted Answer · 2013-06-07 18:49:41Z

1

This is Zero-fill right shift bitwise operator.

answered Jun 7, 2013 at 18:49

antyrat

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