Add Create A Hash From An Array Of Arrays as a ruby 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/).
 
-_426 TILs and counting..._
+_427 TILs and counting..._
 
 ---
 
@@ -298,6 +298,7 @@ _426 TILs and counting..._
 - [Comparing Arrays In RSpec](ruby/comparing-arrays-in-rspec.md)
 - [Construct A Constant From A String](ruby/construct-a-constant-from-a-string.md)
 - [Create an Array of Stringed Numbers](ruby/create-an-array-of-stringed-numbers.md)
+- [Create A Hash From An Array Of Arrays](ruby/create-a-hash-from-an-array-of-arrays)
 - [Create Thumbnail Image For A PDF](ruby/create-thumbnail-image-for-a-pdf.md)
 - [Defaulting To Frozen String Literals](ruby/defaulting-to-frozen-string-literals.md)
 - [Destructuring Arrays In Blocks](ruby/destructuring-arrays-in-blocks.md)

ruby/create-a-hash-from-an-array-of-arrays.md

@@ -0,0 +1,16 @@
+# Create A Hash From An Array Of Arrays
+
+The `::[]` method on the `Hash` class allows you to succinctly create a hash
+from an array of arrays -- or rather an array of tuples which are key value
+pairs.
+
+```ruby
+> Hash[ [["a",2],["b",4]] ]
+{"a"=>2, "b"=>4}
+> Hash[ [[1,2],[3,4]] ]
+{1=>2, 3=>4}
+```
+
+See the [`Hash::[]`
+docs](http://ruby-doc.org/core-2.3.0/Hash.html#method-c-5B-5D) for more
+details.