jashkenas/underscore — pull request #1342 by xspider (2013-11-11 07:14:55+00:00)
Title: Update underscore.js

```javascript
_.each( {length:0,a:1,b:2}, function(a,b){console.log(a,b)} );
```

when obj has `length` attribute, it will be as a Array Object.it's wrong.