Type Alias At<T, Index>

At: Index extends number
    ? `${Index}` extends `-${string}`
        ? never
        : T extends readonly unknown[]
            ? Index extends keyof T
                ? T[Index] extends number ? T[Index] : never
                : never
            : never
    : never

Get the dimension at a specific index

Type Parameters

T extends Shape
Index extends number

Example

type Second = At<[2, 3, 4], 1> // 3
type OutOfBounds = At<[2, 3, 4], 3> // never
type Negative = At<[2, 3, 4], -1> // never

Type Alias At<T, Index>

Type Parameters

Example

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