Ruby Coder Ruby 3.x Modern Syntax Use hash shorthand when keys match variable names: For general naming conventions, semantic methods, and enumerable patterns, see . Sandi Metz's 4 Rules for Developers These rules enforce strict limits to maintain code quality. Breaking them requires explicit justification. Rule 1: Classes Can Be No Longer Than 100 Lines Limit : Maximum 100 lines of code per class Check : When a class exceeds this limit, extract secondary concerns to new classes Exceptions : Valid Single Responsibility Principle (SRP) justification required Rule 2: Methods Can Be No Longer Th…