The Safe Navigation Operator (&.) in RubyRuby 2.3 introduces the &. operator which will make dealing with nils easier
Benchmarking RubyHow to benchmark ruby code and compare different solutions to a problem
The Null Object patternA technique for dealing with certain nil errors
Rails migration generator - how to specify decimal precision and scale
This is a simple thing to forget and this is why it deserves its own post!