{"id":"generator-sum-counting-pattern","text":"Solutions use `sum(1 for x in seq if cond)` as the standard counting idiom rather than `len([...])` or manual accumulators — avoids intermediate list allocation.","truth_value":"IN","source":"entries/2026/06/06/count-integers-with-even-digit-sum-solution.md, entries/2026/06/06/count-items-matching-a-rule-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"generator-sum-counting-pattern","truth_value":"IN","reason":"premise"}]}}