split loop learning hour and refactoring description

_code_smells/divergent_change.md

@@ -1,6 +1,7 @@
 ---
 layout: code_smell
 title: Divergent Change
+name: divergent_change
 source: Martin Fowler
 ---
 
@@ -9,4 +10,4 @@ This is not so much something you can see from reading the code, rather it's som
 
 This code smell does actually stem from a design problem though. Divergent change is a sign that module or class is not cohesive enough.
 
-Note: this is similar but different to [Shotgun Surgery](shotgun_surgery.html) which is a sign your design has a coupling problem.
+Note: this is similar but different to [Shotgun Surgery](shotgun_surgery.html) which is a sign your design has a coupling problem.

_code_smells/loop.md

@@ -1,6 +1,7 @@
 ---
 layout: code_smell
 title: Loops
+name: loops
 source: Martin Fowler
 ---
 

_learning_hours/refactoring/split_loop.md

@@ -0,0 +1,13 @@
+---
+theme: refactoring
+title: Split Loop
+name: split_loop
+code_smell: divergent_change
+kata: theatrical_players
+difficulty: 3
+author: emilybache
+---
+
+# Split Loop
+
+This learning hour is still being developed.

_refactorings/split_loop.md

@@ -0,0 +1,32 @@
+---
+layout: refactoring
+title: Split Loop
+source: Emily Bache
+source_url: https://refactoring.com/catalog/splitLoop.html
+code_smells: loops,divergent_change
+learning_hours: split_loop
+---
+
+# Split Loop
+This is one of the refactorings in Martin Fowler's book. Often this refactoring opens up for a lot of other useful changes.
+
+## Examine
+A loop is of itself a code smell, but even more so when it does more than one thing, which implies Diverent Change.
+
+## Prepare
+Identify the loop you want to split, and in particular which lines within it that hang together and need to be separated from the others. You may need to do some 'introduce variable' refactorings and 'slide statement' refactorings to gather all the relevant parts of the loop together.
+
+## Implement
+
+* Tests all passing
+* Select the whole loop and duplicate it.
+* In one copy of the loop, delete everything except the lines you want to split.
+* In the other copy of the loop, delete only the lines you want to split.
+* Tests all passing.
+
+## Clear
+Double-check the remaining logic in the original loop makes sense and that you didn't delete too much by mistake.
+
+## Follow up
+Often you now want to extract a method for the new loop, or turn it into a pipeline.
+You might identify another part of the old loop that also needs to be split.

newsletter_and_guide.md

@@ -0,0 +1,8 @@
+---
+layout: tdd_guide
+title: Newsletter
+---
+
+# Newsletter and Free Guide to TDD Heuristics
+
+Please use the form below to sign up for our newsletter and receive your free guide.