Author Archives

Ruby developer in London. Ex co-founder of a political party, a startup and a monthly event for entrepreneurs. Telecom engineer (MSc electrical and Computer Science)

• Practical Object-Oriented Design in Ruby

  By Hector Perez Arenas on October 9, 2015 • ( 2 )

  

  This book is great: http://www.poodr.com

• Vim & Tmux video

  By Hector Perez Arenas on October 3, 2015

• Duplication is far cheaper than the wrong abstraction

  By Hector Perez Arenas on August 27, 2015

  Sandy Metz said that if you find yourself passing parameters and adding conditional paths through shared code, the abstraction is incorrect. Then you should go back: Re-introduce duplication by inlining the abstracted code back into every caller. Within each caller,… Read More ›

• Null Object Pattern

  By Hector Perez Arenas on June 15, 2015

  Bad: Good: Seen in the video of Sandi Metz in RailsConf 2015:

• Wikidata

  By Hector Perez Arenas on January 18, 2015

  

  Wikidata is the Wikipedia project for structured knowledge. For example it knows that the capital of Spain is Madrid. The ruby gem wikidata has a basic support to retrieve it: