Add Create Named Structs With Struct.new as a ruby til

README.md

@@ -10,7 +10,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 For a steady stream of TILs from a variety of rocketeers, checkout
 [til.hashrocket.com](https://til.hashrocket.com/).
 
-_806 TILs and counting..._
+_807 TILs and counting..._
 
 ---
 
@@ -614,6 +614,7 @@ _806 TILs and counting..._
 - [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.md)
 - [Create Listing Of All Middleman Pages](ruby/create-listing-of-all-middleman-pages.md)
+- [Create Named Structs With Struct.new](ruby/create-named-structs-with-struct-new.md)
 - [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)
 - [Define A Custom RSpec Matcher](ruby/define-a-custom-rspec-matcher.md)

ruby/create-named-structs-with-struct-new.md

@@ -0,0 +1,38 @@
+# Create Named Structs With Struct.new
+
+I often see `Struct` used to create some one-off anonymous data structure
+like so:
+
+```ruby
+> person = Struct.new(:name, :age)
+=> #<Class:0x007fc6c89112e8>
+> person.new("Alice", 33)
+=> #<struct name="Alice", age=33>
+```
+
+This will often get the job done, but on its own the resulting data
+structure doesn't tell us as much as it could.
+
+We can say more with a _named_ struct:
+
+```ruby
+Struct.new("Person", :name, :age)
+=> Struct::Person
+> Struct::Person.new("Bob", 24)
+=> #<struct Struct::Person name="Bob", age=24>
+```
+
+When the first argument is a string that can be converted to a constant,
+then we'll get a named struct that is subclassed under `Struct`.
+
+We can also assign the struct initialization to a constant to do a similar
+thing:
+
+```ruby
+> Person = Struct.new(:name, :age)
+=> Person
+> Person.new("Jerry", 45)
+=> #<struct Person name="Jerry", age=45>
+```
+
+[source](https://ruby-doc.org/core-2.4.2/Struct.html#method-c-new)