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➖ LastOfArray
pengzhanbo
100字小于1分钟
2022-12-01
题目
Github: Last of array
实现一个通用Last<T>，它接受一个数组T并返回其最后一个元素的类型。
type arr1 = ['a', 'b', 'c']
type arr2 = [3, 2, 1]
type tail1 = Last<arr1> // expected to be 'c'
type tail2 = Last<arr2> // expected to be 1Answer
type Last<T extends any[]> = T extends [...any[], infer R] ? R : never