rafa/docs/Stream-fold.md

Rafa.js is a Javascript framework for building concurrent applications.

Fold all values producing a single value when the stream is done.

<aside>
```js
// fold(seed: A, folder: (A,A) => A): Stream
var stream = Rafa.stream();
var values = [];

stream.fold(1, (a,b) => a + b).done(v => values.push(v));

stream.enumerate(Rafa.Enumerator.array([1,2,3,4]);

// values: [11];
```
</aside>