How can I convert the "arguments" object to an array in JavaScript?

The arguments object in JavaScript is an odd wart—it acts just like an array in most situations, but it's not actually an array object. Since it's really something else entirely, it doesn't have the useful functions from Array.prototype like forEach, sort, filter, and map. It's trivially easy to construct a new array from an arguments object with a simple for loop. For example, this function sorts