EnumEx.ts

// only works with number enums...
class EnumEx {
    private constructor() {
    }
	
    static getMembersCount(e: any) {
        return EnumEx.getNames(e).length;
    }
	
    static getMemberValue(e: any, memberName: string) {
        return e[memberName] as number;
    }
	
    static getNamesAndValues(e: any) {
        return this.getNames(e).map(n => ({ name: n, value: e[n] as number }));
    }

    static getNames(e: any) {
        return Object.keys(e).filter(k => typeof e[k] === "number") as string[];
    }

    static getValues<T extends number = number>(e: any) {
        return Object.keys(e)
            .map(k => e[k])
            .filter(v => typeof v === "number") as T[];
    }
}