{"id":"null-object-meta-pattern-in-strategy-and-iterator","text":"Strategy's optional null strategy (where Context checks for absence and falls back to default behavior) and NullIterator's always-done semantics both instantiate a similar null-object pattern: each uses a degenerate or absent object conforming to a standard interface so that clients can treat the null case uniformly without special-casing absence.","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["gof-strategy-optional-with-default-behavior","null-iterator-always-done"],"outlist":[],"label":"Both patterns independently discover null objects as the mechanism for uniform optional composition"}],"dependents":["efficiency-meta-patterns-manage-composition-proliferation-costs","incremental-adoption-infrastructure-spans-composition-paradigm"],"metadata":{"source_type":"derived","review_result":"invalid","repair_action":"softened"},"created_at":"2026-06-18T03:58:42+00:00","updated_at":"2026-06-18T06:45:37+00:00","reviewed_at":"2026-06-18T06:15:08+00:00","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"null-object-meta-pattern-in-strategy-and-iterator","truth_value":"IN","reason":"SL justification valid","antecedents":["gof-strategy-optional-with-default-behavior","null-iterator-always-done"],"label":"Both patterns independently discover null objects as the mechanism for uniform optional composition"},{"node":"gof-strategy-optional-with-default-behavior","truth_value":"IN","reason":"premise"},{"node":"null-iterator-always-done","truth_value":"IN","reason":"premise"}]}}