rafa/docs/Channel-read.md

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

Read a value from the channel by providing a callback function that accepts a 
value. The method returns 1 is the callback was called immediately, 2 if
the callback was registered to receive the next value written, and 0 if the 
callback was already registered.

<aside>
```js
// read(callback: A => _): Int
var channel = Rafa.channel();
var values = [];
var results = [];

results.push(channel.read(v => values.push(v+1)));
results.push(channel.read(v => values.push(v+2)));
channel.write(1);

// values: [2];
// results: [2,0];
```
</aside>