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                                            Chao X

「重学TS 2.0 」TS 练习题第五题

感觉这样实用点，一般是往后插一个或多个参数。 ``` type Fn = (a: number, b: string) => number; type AppendArgument any, A extends unknown[]> = (...args: [...Parameters, ...A]) => ReturnType; type AppendFn = AppendArgument; // (a: number,...