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.
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As we prepare to leave the winter months, Samsung announced another family of Galaxy S flagships for those looking to upgrade. As usual, the company put its best components and features into the Galaxy S26 Ultra, but it also added more to the base S26 and S26+. The company has hit its groove with its smaller (and cheaper) flagships, delivering solid devices with increasingly better cameras, occasionally even offering feature parity with its most expensive smartphone.。搜狗输入法2026对此有专业解读
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Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04