After defining the following enum:
export enum Types {
Type1 = 1,
Type2 = 2,
...
}
We can create an array based on this enum with the function below:
export function EnumKeys<T>(obj: object): string[] {
return Object.keys(obj)
.filter(value => isNaN(Number(value)) === false)
.map(key => obj[key]);
}
The EnumKeys function currently returns a string[], but I require it to return [keyof typeof T]
Object.keys intentionally returns a string[] (refer to main question here). To convert Object.keys(obj) into Array<keyof T>, you will need to utilize a type (assuming the T type parameter for the type of obj).
enum Types {
Type1 = 1,
Type2 = 2,
}
function EnumKeys<T>(obj: T) {
return (Object.keys(obj) as Array<keyof T>)
.filter(value => isNaN(Number(value)) !== false); // only consider non-number keys.
}
let o = EnumKeys(Types)
console.log(o)
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