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Kotlin 实战深入《Practical Kotlin Deep Dive》从 Kotlin 核心语言基础与内部机制出发，深入剖析 Kotlin 背后的「如何」与「为什么」，并延伸至其 API 的设计理念。本书涵盖 Kotlin 基础、标准库、协程、kotlinx 系列库、编译器内部实现以及 Kotlin Multiplatform。

本书不止停留在表层 API 的使用，而是深入 Kotlin 内部：通过真实的 Kotlin 函数实现，解析生成的字节码，讲解 Kotlin 编译器如何理解和处理这门语言。同时，本书直接引用 KEEP 提案、JetBrains YouTrack 讨论以及编译器源码，将概念与其起源和设计动机紧密结合，帮助你学会「理解 Kotlin」，而不仅仅是记住 API。

通过循序渐进的内容编排，本书确保你不仅知道如何高效地使用 Kotlin，还能理解语言为何如此设计，从而将这些洞见直接转化为更高质量的代码。

为了支持持续成长，本书提供了精心整理的参考资料和延伸阅读，帮助你在书本之外继续深入探索。对于复杂或不常见的术语，书中配有通俗易懂的脚注说明，使高级内容对初学者也同样友好，同时为资深开发者带来新的启发。

“Pro Tips for Mastery” 章节深入挖掘 Kotlin 函数的内部结构、算法、Kotlin 编译器的行为，以及在真实项目中至关重要的实现细节。资深工程师可以从中发现值得深思的细节，进一步打磨专业能力；而中级开发者则能借此提升 Kotlin 水平，建立更扎实的分析思维。

无论你是在优化性能关键代码、处理复杂的协程任务，还是探索多平台开发，本书都会引导你超越教程式学习，深入理解语言设计与内部机制，以更清晰的认知、更强的好奇心和更充分的信心来进行 Kotlin 开发。

— Jaewoong Eum (skydoves)

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