Conditional set: set_if atomically sets the value only when the current value satisfies a predicate, useful for state machine transitions that should only happen from a specific state.
so that it is easy to reuse the (big) array instead of consuming it
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决定胜负的“隐形战场”在海外，OpenAI 将火力集中在垂直赛道，推出了代码专用大模型 GPT-5.3-Codex 及其细分版本；而谷歌 DeepMind 与 Anthropic 则坚守通用底座的迭代，先后发布 Gemini 2.0 Pro 与 Claude Opus 4.6。。51吃瓜对此有专业解读
What the salespeople say about nothing being shared onwards does not appear to be correct.