Question 72846 in Reactjs Question posted in
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Best way to convert Enum to Set in typescript – Reactjs

I have the following enum:

enum Animes {
    OnePiece = 'One Piece',
    Naruto = 'Naruto',
    Bleach = 'Bleach'
}

What is the best way to convert this enum to a Set?

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3

Answers


  1. Chosen as BEST ANSWER
    0

    I figure out that we can do something like:

    const animes = new Set(Object.values(Animes))

    Not sure if this is the best way (more efficient/cleaner) way to do it.

    PS: You can test it here


  2. 0

    Obviously, there’s

    new Set([Animes.OnePiece, Animes.Naruto, Animes.Bleach])

    but there’s also Object.values:

    const anime = new Set(Object.values(Animes));
//    ^^^^^ inferred as Set<Animes>

    However, this only works if your enum does not contain numerical values.

    enum What { A, B, C }

new Set(Object.values(What)) // Set { "A", "B", "C", "0", "1", "2" }

    Playground

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  3. 0

    Given that enums in Typescript are just objects, you could do: const mySet = new Set(Object.values(Animes));.

    This would be incorrect for numeric enums since they have this weird bidirectional access, in that case just use: const mySet = new Set(Object.values(MyEnum).filter(x => typeof x === "string"));

    Although this is the simplest way, and due to how these functions are typed, you’d lose the type information

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