LowFile-scopeRuby Plug & play

Use guard clauses for early returns

Validate and return early to avoid deep nesting.

Why this matters

Simplifies control flow and reduces cognitive load.

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

Avoid

if params[:id]
  if current_user
    process
  end
end

Prefer

return head :bad_request unless params[:id]
return head :unauthorized unless current_user
process

Bad

nested ifs

Good

return unless ...; main path

From the same buckets as this rule.

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 equality operators in loop termination conditions
Check if loops use equality operators (== or !=) in termination conditions. These can lead to infinite loops if the condition is never met exactly. Instead, use relational operators like < or > for safer loop termination.
error-handlingreadability-refactor
Critical
Avoid Equality Operators in Loop Termination Conditions
Ensure that relational operators (`<`, `>`) are used instead of equality operators (`==`, `!=`) in loop termination conditions.
readability-refactor