So far, I've focused on weird little freaks who were introduced after Pokémon got its start in 1996. I don't want anyone to think I'm ignoring the original 151, plenty of whom are quirky and goofy in their own ways. One such weirdo is Lickitung, who just has a giant tongue that it uses to lick things. Sometimes weirdness is simple like that. Give a little guy a big tongue and make that his defining feature, and you've got yourself a 30-year-strong weird little guy.
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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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