documentcloud/underscore — pull request #524 by octatone (2012-03-25 16:32:22+00:00)
Title: New Feature: _.isFinite to compliment _.isNumber and _.isNaN

Adds ability to test whether an obj/value is a finite number. [Adds feature discussed in issue #406](https://github.com/documentcloud/underscore/issues/406)

Tests included.

```JavaScript
// Is a givin number finite?
_.isFinite = function(obj) {
return obj > -1/0 && obj < 1/0 && obj === +obj;
};
```