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rara-record
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Jul 26, 2025
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| for (idx, &n) in nums.iter().enumerate() { | ||
| let pair = target - n; | ||
| if let Some(&pair_idx) = map.get(&pair) { |
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저는 처음에 set으로 숫자 존재 여부만 체크했다가,
결국 배열을 다시 뒤져 인덱스를 찾아야 하는 불필요한 과정을 겪었어요.
HashMap + 가드 리턴 패턴을 보니, 앞쪽에서 바로 종료돼서 훨씬 효율적이네요!
배워갑니다 🙌
rara-record
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Jul 26, 2025
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