What is the proper way to specify the type of a mixed Map?

    private readonly _subscriptions:???? = new Map([
        ['a', new Map()],
        ['b', new Map()],
        ['c', new Map()],
        ['d', []]
        
    ])

No suitable type was found for this map. I tried various options without success.

It should probably be something like Map | []

private readonly _subscriptions:Map<string, {}|[]> = new Map([

private readonly _subscriptions:Map<string, Map<string,[]>|[]> = new Map([

Answer №1

To achieve this, you can:

const _subscribers = new Map<string, (Map<any, any> | [])>([
    ['x', new Map()],
    ['y', new Map()],
    ['z', new Map()],
    ['w', []]
]);

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