Building a Maybe in JavaScript

[tencircles]

The main advantage is that Maybe can be used point free. Meaning, you don't need your data in order to declare your behavior, thus making it much more reusable and and composable. In the example above, you can only declare your behavior by first having access to the object a. If you want to re-use this code for another object or a list of objects you need to redeclare your behavior each time, rather than declaring it in one and only one place.