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 * [Iván López Martín](https://www.slideshare.net/ilopmar/metaprogramming-with-groovy) - (2014) [Slides] Metaprogramming with groovy
 * [Gregory Dickson](https://medium.com/@gregory.d.dickson/why-groovy-is-so-groovy-or-a-beginners-guide-to-hacking-groovy-e0ad6f32c300) - (2017) Why Groovy is so groovy or a beginners guide to hacking Groovy
 * [Jenkins Wiki](https://wiki.jenkins.io/display/JENKINS/Groovy+Hook+Script) - Groovy Hook Scripts
+* [PLEAC-Groovy](http://pleac.sourceforge.net/pleac_groovy/) - implementation of the Solutions of the Perl Cookbook in the Groovy language
 
 ## Haskell
 * [Miran Lipovača](http://learnyouahaskell.com/chapters) - [Book] Learn You a Haskell for Great Good! and for free