type-plus
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    Type Alias _D<A, B, C, DeleteCount, Insert>

    _D: DeleteCount extends C["length"]
        ? IsTuple<
            Insert,
            { $else: [[...B, ...A], C]; $then: [[...B, ...Insert, ...A], C] },
        >
        : A extends readonly [infer Head, ...(infer Tail)]
            ? ArrayPlus.SplitAt._D<Tail, B, [...C, Head], DeleteCount, Insert>
            : IsTuple<Insert, { $else: [B, C]; $then: [[...Insert, ...B], C] }>

    Type Parameters

    • A extends readonly unknown[]
    • B extends readonly unknown[]
    • C extends readonly unknown[]
    • DeleteCount
    • Insert extends readonly unknown[]