RESOURCE: Code Smells and more (Design Patterns, Anti-Patterns and Refactoring Tips)

One interesting reference guide to design patterns (and anti-patterns) as well as "code smells" (who happen when the code you're touching smells like a rotten bird in your garden) is: 

• https://sourcemaking.com/design_patterns (Design Patterns: structural and more; also remember to avoid anti-patterns)
• https://sourcemaking.com/refactoring (code smells: what to do to improve this "code smell"?)

Nice readings.