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其中最具代表性的是累计分组操作。在分析设备运行状态时，经常需要计算“设备连续处于异常状态的时间长度”——这在传统 SQL 中需要复杂的窗口函数和递归查询。而在 DolphinDB 中，只需一行语句，就能自然表达这种累积逻辑。

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Perplexity推出三款全新开发者工具：Embeddings API、Agent API和Sandbox API，为开发者提供其Computer系统底层编排能力。这些API统一了检索、智能和计算层，让开发者能够通过单一API密钥替代复杂的多供应商技术栈。其中Agent API提供托管运行时环境，编排完整的智能体循环流程；Embeddings API支持内部系统向量搜索；Sandbox API则 ...

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作者 | Michael Redlich译者 | 张卫滨JDK 26JDK 26 的 早期访问版本 中，Build 35 仍是当前最新版本。该版本详情可查阅 发布说明。JDK 27本周发布了 JDK 27早期访问版本 的 Build 12，对 Build 11 的各种 问题 进行了 修复。该版本详情可查阅 发布说明。关于 JDK 26 和 JDK 27，鼓励开发者可通过 Java Bug Data ...

JDK 26 moves to general production availability. This short-term release is backed by six months of Premier-level support. Java Development Kit (JDK) 26, the latest standard Java release from Oracle, ...

1、 准备两个待合并的映射表，示例中通过新建获取，实际应用时应从数据库或其它数据源读取所需数据。 2、 调用putAll方法合并map时，需先判断对象是否为null。为避免map01为null导致无法合并map02，应新建一个map实例来确保操作顺利执行。