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#03057 push #12

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pkc918 opened this issue Aug 11, 2023 · 0 comments

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pkc918 commented Aug 11, 2023

问题

type Result = Push<[1, 2], '3'> // [1, 2, '3']

实现push功能

答案

type Push<T extends unknown[], U> = [...T, U]

###讲解
限制 T 是元组类型，然后通过展开运算符，形成新元组类型

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