Add Word Lists For Atoms as an elixir til

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/).
 
-_438 TILs and counting..._
+_439 TILs and counting..._
 
 ---
 
@@ -86,6 +86,7 @@ _438 TILs and counting..._
 - [Expose Internal Representation](elixir/expose-internal-representation.md)
 - [List Functions For A Module](elixir/list-functions-for-a-module.md)
 - [Replace Duplicates In A Keyword List](elixir/replace-duplicates-in-a-keyword-list.md)
+- [Word Lists For Atoms](elixir/word-lists-for-atoms.md)
 
 ### Git
 

elixir/word-lists-for-atoms.md

@@ -0,0 +1,34 @@
+# Word Lists For Atoms
+
+The `~w` sigil works similarly to Ruby's `%w` (word array notation). It
+allows you to create a list of words (namely, strings).
+
+```elixir
+~w(one two three)
+["one", "two", "three"]
+```
+
+It sets itself apart though with some modifiers. The default behavior
+matches the `s` modifier (for strings).
+
+```elixir
+> ~w(one two three)s
+["one", "two", "three"]
+```
+
+Where it gets more interesting is with the `a` modifier allowing you to
+create a list of atoms.
+
+```elixir
+> ~w(one two three)a
+[:one, :two, :three]
+```
+
+Note: there is a third modifier, `c`, for char lists.
+
+```elixir
+> ~w(one two three)c
+['one', 'two', 'three']
+```
+
+[source](http://elixir-lang.org/getting-started/sigils.html)