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LastIndexOf medium #array

by jiangshan @jiangshanmeta

Take the Challenge

Implement the type version of Array.lastIndexOf, LastIndexOf<T, U> takes an Array T, any U and returns the index of the last U in Array T

For example:

type Res1 = LastIndexOf<[1, 2, 3, 2, 1], 2> // 3
type Res2 = LastIndexOf<[0, 0, 0], 2> // -1

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