Merge pull request coffeescript-cookbook#5 from sebslomski/master

jQuery callback bindings.

Author: peterhellberg

chapters/jquery/callback-bindings-jquery.textile

@@ -0,0 +1,32 @@
+---
+layout: recipe
+title: Callback bindings # using => instead of ->
+chapter: jQuery
+---
+
+h2. Problem
+
+You want to bind a callback function to an object.
+
+h2. Solution
+
+{% highlight coffeescript %}
+$ ->
+  class Basket
+    constructor: () ->
+      @products = []
+
+      $('.product').click (event) =>
+        @add $(event.target).attr 'id'
+
+    add: (product) ->
+      @products.push product
+      console.log @products
+
+  new Basket()
+{% endhighlight %}
+
+h2. Discussion
+
+By using the fat arrow => instead of the normal arrow -> the function gets
+automatically bound to the object and can access the @-variable