caolan/async — pull request #236 by absentTelegraph (2013-02-13 19:31:36+00:00)
Title: Adding an optional context arg to memoize.

Do you think something like this would be a good idea?

Adding a context option to memoize so that methods of an object can preserve ``this``. For example:

```javascript
var obj = {
bar: 'value',
foo: functions (arg, callback) {
callback(this.bar + '!');
}
};

obj.foo = async.memoize(obj.foo, null, obj);
```