CODEWITHSUNDEEP
typescript
Chris Long
Chris Long

Reputation: 3074

How to get all values in a string enum?

I have a string enum and need to get all the values. For instance, for the below enum, I'd like to return ["Red", "Yellow"]:

export enum FruitColors {
    Apple = "Red",
    Banana = "Yellow",
}

Upvotes: 9

Views: 12762

Answers (4)

brunnerh
brunnerh

Reputation: 184947

You can inspect the FruitColors object.

Note that if you do not assign names for the enum values, the generated code will be different and a simple key/value based mapping will lead to wrong results. e.g.

export enum FruitColors {
    "Red",
    "Yellow",
}

Object.values(FruitColors); // ["Red", "Yellow", 0, 1]

Because the generated code is along these lines:

var FruitColors;
(function (FruitColors) {
    FruitColors[FruitColors["Red"] = 0] = "Red";
    FruitColors[FruitColors["Yellow"] = 1] = "Yellow";
})(FruitColors = exports.FruitColors || (exports.FruitColors = {}));

You could then just filter the results by typeof value == "string".

Upvotes: 2

KaiPham
KaiPham

Reputation: 1

Maybe you can try this function, it can return all values in string + number enum type, not only string Enum

const getAllValuesEnum = (enumType: any) => {
  const keysAndValues = Object.values(enumType);
  const values = [];

      keysAndValues.forEach((keyOrValue: any) => {
        if (isNaN(Number(keyOrValue))) {
          values.push(enumType[keyOrValue] || keyOrValue);
        }
      });

      return values;
    };

Example:

enum MyEnum {
  A = "a",
  B = 7,
  C = "c",
  D = 1,
}

It will return [ 1, 7, 'a', 'c' ]

Upvotes: -1

SLaks
SLaks

Reputation: 887657

You're looking for Object.values()

Upvotes: 16

Chris Long
Chris Long

Reputation: 3074

According to this GitHub comment, this can be achieved the following way:

Object.keys(FruitColors).map(c => FruitColors[c]);

Upvotes: 1

Related Questions