Code smells

• Rigidity - The software is difficult to change - A small change causes a cascade of subsequent changes
• Fragility - The software breaks in many places due to a single change
• Immobility - You cannot reuse parts of the code in other projects because of involved risks and high effort
• Opacity - The code is hard to understand
• Needless Complexity
• Needless Repetition

Style

• Put the caller above the callee

Law of Demeter

• Modules shouldn't know about the internals of the classes they use

Procedural vs. OOP

Procedural - a class ex. DBHandler that operates on a data structurel

• This can be favorable for data structures that aren't meant to be modified

OOP - Is better for evolving data types