#354 Finish Readme

feature-toggle/index.md

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+---
+layout: pattern
+title: Feature Toggle
+folder: feature-toggle
+permalink: /patterns/feature-toggle/
+categories: Behavioral
+tags:
+ - Java
+ - Difficulty-Beginner
+---
+
+## Also known as
+Feature Flag
+
+## Intent
+Used to switch code execution paths based on properties or groupings. Allowing new features to be released, tested
+and rolled out. Allowing switching back to the older feature quickly if needed. It should be noted that this pattern,
+can easily introduce code complexity. There is also cause for concern that the old feature that the toggle is eventually
+going to phase out is never removed, causing redundant code smells and increased maintainability.
+
+![alt text](./etc/feature-toggle.png "Feature Toggle")
+
+## Applicability
+Use the Feature Toogle pattern when
+
+* Giving different features to different users.
+* Rolling out a new feature incrementally.
+* Switching between development and production environments.
+
+## Credits
+
+* [Martin Fowler 29 October 2010 (2010-10-29).](http://martinfowler.com/bliki/FeatureToggle.html)