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Sarj Sarj Sarj Standards

prefer-non-nullable-collection

Suggest reviewing nullish arrays that use local empty-array defaults or a shared null-or-empty guard.

preferNonNullableCollection Rule source Tests Catalog JSON

Why

A redundant nullish collection state spreads defaults and guards through consumers without carrying information.

Fix

Use a non-null collection type and normalize omitted input to an empty collection at the boundary.

Examples

Before — flagged Do not retain a redundant nullish state
src/search.ts
interface Input {
  items: string[] | undefined;
}
function search({ items = [] }: Input) {
  return items.length;
}
After — preferred Model an always-present collection
src/search.ts
interface Input {
  items: string[];
}
function search({ items }: Input) {
  return items.length;
}