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並前往https://softwareengineering.stackexchange.com/questions/410724/why-f-rust-and-others-use-option-type-instead-of-nullable-types-like-c-8-or-t

Why F#, Rust and others use Option type instead of nullable ...

I'm only asking why not use compile-time metadata, like C# 8's nullable reference types and TypeScript with strict null checks, where default ...

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