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sobani | 5 months ago

How many of those languages can take an expression instead of a lambda?

Func<..> is lambda that can only be invoked.

Expression<Func..>> is an AST of a lambda that can be transformed by your code/library.

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Tyr42|5 months ago

R let's you do that, and it gets used by the tidy verse libraries to do things like change the scope variables in the functions are looked up in.