The compiler performs type checking on the arguments to swap because the prototype of swap includes argument types for each parameter.
自动推断类型的能力让很多编程任务变得容易,让程序员可以忽略类型标注的同时仍然允许类型检查。
The ability to infer types automatically makes many programming tasks easier, leaving the programmer free to omit type annotations while still permitting type checking.
At the core of Angular lies TypeScript- a programming language that allows for easier code maintenance and a type system with reliable type checking.
自动推断类型能简化许多编程任务,使程序员可以自由地省略类型注释,同时仍允许类型检查。
The ability to infer types automatically makes many programming tasks easier, leaving the programmer free to omit type annotations while still permitting type checking.
Static type checking enables faster execution because type checking need not be performed at runtime and because values can be stored in more efficient representations.
It does basic type checking of arrays versus scalars, and assigns integer indexes to all variable references(to avoid slower map lookups at execution time).
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