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Considering the following example: type Foo<T> = (x: T) => T[] type X = ReturnType<Foo<number>> As expected, X = number[] Now, the function is a part of an interface: interface Bar { foo<T>(x: T): T[] } type BarFoo = Bar[‘foo’] type Y = ReturnType<BarFoo<number>> type Z = ReturnType<Bar[‘foo’]<number>> Line Y fails with BarFoo is not […]
Choosing the right domain name is one of the most critical steps for building a website. Every website you visit is built on a domain name—a crucial part of its identity on the internet. Among the different types of domains, generic domain names often play an essential role in shaping a brand. Whether you’re starting a business or looking […]
Combining Swift’s flexible generics system with protocol-oriented programming can often lead to some really powerful implementations, all while minimizing code duplication and enabling us to establish clearly defined levels of abstraction across our code bases. However, when writing that sort of code before Swift 5.7, it’s been very common to run into the following compiler […]
Combining Swift’s powerful generics system with the fact that any Swift type can be extended with new APIs and capabilities enables us to write targeted extensions that conditionally add new features to a type or protocol when it fits certain requirements. It all starts with the where keyword, which lets us apply generic type constraints […]