LowFile-scopeRuby Plug & play

Remove unused variables and assignments

Delete unused locals or prefix with underscore when required by interface.

Why this matters

Improves readability and eliminates misleading code.

Side-by-side examples engineers can pattern-match during review.

Avoid

result = compute; compute2

Prefer

_result = compute if needed_for_side_effects

Bad

tmp = something # never used

Good

_tmp = something

From the same buckets as this rule.

Critical
Avoid Duplicating String Literals
Store repeated string literals in constants or variables to improve maintainability and reduce redundancy.
duplication-complexitymaintainability
Critical
Avoid Empty Methods
Detect methods that have an empty body. If a method is empty, ensure that a comment is present explaining why it remains unimplemented.
maintainabilityreadability-refactor
Critical
Avoid modifying built-in prototypes
Detect modifications to built-in prototypes. Modifying built-in objects can lead to compatibility issues and unexpected behavior. Recommend creating helper functions instead.
maintainabilitysecurity-hardening