Is there a way to extract only the values of an enum and store them in an array? For example, if we have:
enum A {
dog = 1,
cat = 2,
ant = 3
}
Desired output: ["dog", "cat", "ant"] achieved by:
Object.values(A)
Unfortunately, using this method results in: ["dog", "cat", "ant", 0, 1, 2]
Another issue is that the returned values (0, 1, 2) don't match the actual values (1, 2, 3). How can this be resolved?
Unfortunately, you cannot directly access an enum's keys in Typescript because it compiles the enum into a structure like this:
var A;
(function (A) {
A[A["dog"] = 1] = "dog";
A[A["cat"] = 2] = "cat";
A[A["ant"] = 3] = "ant";
})(A || (A = {}));
You can check out this link to see how the code is compiled in the typescript playground.
However, there is a workaround to get the keys of an enum by using the following code:
Object.keys(A).filter(isNaN)
This solution works because Enums cannot contain numeric values as entries.
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