rafa/docs/Stream-each.md

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

Return a new child stream that handles all values (non-errors) that pass 
through the stream. Return values from the handler function have to affect
on values sent to child streams (cannot be transformed).

<aside>
```js
// # each(unit: A => undefined): Stream
var stream = Rafa.stream();
var value = null;

stream.each(v => value = v);

stream.write(23);

// value: 23;
```
</aside>