From 7afd3debe4510bc75d4235514f21f8a66c5d00ec Mon Sep 17 00:00:00 2001
From: jbranchaud <jbranchaud@gmail.com>
Date: Mon, 1 Jun 2015 08:02:03 -0500
Subject: [PATCH] Add FactoryGirl Sequences as a ruby til.

---
 README.md                      |  1 +
 ruby/factory-girl-sequences.md | 43 ++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 ruby/factory-girl-sequences.md

diff --git a/README.md b/README.md
index 613f092..0c48822 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Destructuring Arrays In Blocks](ruby/destructuring-arrays-in-blocks.md)
 - [Disassemble Some Codes](ruby/disassemble-some-codes.md)
 - [Evaluating One-Off Commands](ruby/evaluating-one-off-commands.md)
+- [FactoryGirl Sequences](ruby/factory-girl-sequences.md)
 - [Finding The Source of Ruby Methods](ruby/finding-the-source-of-ruby-methods.md)
 - [Limit Split](ruby/limit-split.md)
 - [Parallel Bundle Install](ruby/parallel-bundle-install.md)
diff --git a/ruby/factory-girl-sequences.md b/ruby/factory-girl-sequences.md
new file mode 100644
index 0000000..369fce4
--- /dev/null
+++ b/ruby/factory-girl-sequences.md
@@ -0,0 +1,43 @@
+# FactoryGirl Sequences
+
+[FactoryGirl sequences](https://github.com/thoughtbot/factory_girl/blob/master/GETTING_STARTED.md#sequences)
+are often used inline for unique values such as emails:
+
+```ruby
+factory :user do
+  sequence(:email) { |n| "person#{n}@example.com" }
+end
+```
+
+However, a sequence can be defined on its own
+
+```ruby
+FactoryGirl.define do
+  sequence :email do |n|
+    "person#{n}@example.com"
+  end
+end
+```
+
+That means it can be invoked outside the context of a factory
+
+```ruby
+> FactoryGirl.generate :email
+=> "person1@example.com"
+> FactoryGirl.generate :email
+=> "person2@example.com"
+```
+
+Or it can be used as a shared sequence across multiple factories
+
+```ruby
+factory :customer do
+  ...
+  email
+end
+
+factory :admin do
+  ...
+  email
+end
+```