Transforming a Typescript tuple into an object type

Let's consider a scenario where I have a tuple type structured like this:

type Data<T extends string, V> = { type: T, value: V };
type TupleExample = [
    Data<'string', string>, 
    Data<'number', number>, 
    Data<'integer', number>
];

My goal is to transform the type TupleExample into the following type:

type ObjectTuple = {
    string: string,
    number: number,
    integer: number,
};

I'm wondering if there is a way to achieve this and if so, what steps do I need to take? Currently, I've been able to generate the type as shown below:

type ObjectTuple = {
    string: string | number,
    number: string | number,
    integer: string | number,
};

Answer №1

To achieve this, utilize a mapped type alongside an as clause to iterate through Tuple[number]

type TupleToObject<T extends Array<Test<string, any>>> = {
    [K in T[number] as K['type']]: K['value']
}

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