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.
2月27日，Rapidus公司宣布，已完成总额2676亿日元（约合17亿美元）的融资，资金来自日本政府及私营企业，其中日本经济产业省下属独立行政机构注资1000亿日元，该战略融资计划将助力Rapidus公司稳步推进研发进程，于2027年前实现2纳米逻辑半导体的量产目标。Rapidus同时宣布获得来自32家企业的私募融资，总额达1676亿日元，投资方包括佳能、日本政策投资银行、富士通、NTT、软银集团及索尼集团等。（界面）
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融入中国百姓的烟火寻常，正成为入境游的新玩法——不仅沉醉于古老中国的千年风华，也想探寻中国发展日新月异的深层密码。