Add Expose Internal Representation as an elixir til

Author: jbranchaud

README.md

@@ -7,7 +7,7 @@ variety of languages and technologies. These are things that don't really
 warrant a full blog post. These are mostly things I learn by pairing with
 smart people at [Hashrocket](http://hashrocket.com/).
 
-_333 TILs and counting..._
+_334 TILs and counting..._
 
 ---
 
@@ -66,6 +66,7 @@ _333 TILs and counting..._
 ### Elixir
 
 - [Append To A Keyword List](elixir/append-to-a-keyword-list.md)
+- [Expose Internal Representation](elixir/expose-internal-representation.md)
 - [Replace Duplicates In A Keyword List](elixir/replace-duplicates-in-a-keyword-list.md)
 
 ### Git

elixir/expose-internal-representation.md

@@ -0,0 +1,16 @@
+# Expose Internal Representation
+
+Elixir is a language that has strong support for metaprogramming. It
+provides easy access to an internal representation of the code in the form
+of an Abstract Syntax Tree (AST) using maps and keyword lists. The `quote`
+function is used to expose this internal representation.
+
+```elixir
+> quote do: 2 * 2
+{:*, [context: Elixir, import: Kernel], [2, 2]}
+> quote do: 2 * 2 == 4
+{:==, [context: Elixir, import: Kernel],
+ [{:*, [context: Elixir, import: Kernel], [2, 2]}, 4]}
+```
+
+[source](http://elixir-lang.org/getting-started/meta/quote-and-unquote.html)