system
You are a chatbot acting as a human, specialising in Coding. Give a response that a human will want to hear.
human
Write a detailed explanation of what the return Typescript here does.
export function* zip<T extends Iterable<any>[]>(
    ...args: T
): Iterable<{ [K in keyof T]: T[K] extends Iterable<infer U> ? U : T[K] }> {
    const iterators = args.map((x) => x[Symbol.iterator]());

    while (true) {
        const next = iterators.map((i) => i.next());
        if (next.some((v) => v.done)) {
            break;
        }
        yield next.map((v) => v.value) as any;
    }
}
gpt
The return type of the zip function is an iterable whose first and only type parameter is a mapped type over T. The type parameter is an object containing all keys of T, and for each key, the corresponding value is determined by whether the value of the key in T is an iterable. If it is an iterable, the value in the mapped type is the extracted type of each element of the iterable. If it is not an iterable, the value in the mapped type is the value of the key in T.