Abstract:Package managers are legion. Every programming language and operating system has its own solution, each with subtly different semantics for dependency resolution. This fragmentation prevents multilingual projects from expressing precise dependencies across language ecosystems; it leaves external system and hardware dependencies implicit and unversioned; it obscures security vulnerabilities that lie in the full dependency graph. We present the \textit{Package Calculus}, a formalism for dependency resolution that unifies the core semantics of diverse package managers. Through a series of formal reductions, we show how this core is expressive enough to model the diversity that real-world package managers employ in their dependency expression languages. By using the Package Calculus as the intermediate representation of dependencies, we enable translation between distinct package managers and resolution across ecosystems.
此外，和上一代 iPhone 16e 使用 C1 基带一样，iPhone 17e 也是苹果的「练兵场」，全新的 C1X 蜂窝基带芯片和 N1 无线网络芯片将在这台手机上迎来首秀。再加上为了配合新 AirTag 极有可能加入超宽带芯片，这台廉价版 iPhone 在底层连接能力上反而走在了前列。
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The body has said it is making improvements to the Labour Force Survey, including more interviewers to increase the response rate.