kaitolucifer 最近的时间轴更新
kaitolucifer

kaitolucifer

V2EX 第 304402 号会员,加入于 2018-03-29 14:25:21 +08:00
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2020-10-22 19:29:10 +08:00
回复了 JCZ2MkKb5S8ZX9pq 创建的主题 Python Python 多个列表相加怎么写
The issue of quadratic performance of sum(sequences, null_seq) is known, which is why the doc says that sum() is for numbers and recommends .join for strings and itertools.chain for other sequences.

上面那个 sum trick 貌似很慢?
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