ramda/ramda — pull request #539 by davidchambers (2014-11-18 17:14:46+00:00)
Title: make R.isEmpty equivalent to _.isEmpty

Closes #538

[Underscore][1]:

```javascript
// Is a given array, string, or object empty?
// An "empty" object has no enumerable own-properties.
_.isEmpty = function(obj) {
if (obj == null) return true;
if (_.isArray(obj) || _.isString(obj) || _.isArguments(obj)) return obj.length === 0;
for (var key in obj) if (_.has(obj, key)) return false;
return true;
};
```

[1]: https://github.com/jashkenas/underscore/blob/1.7.0/underscore.js#L1068-L1075