ArraySortBy

export function ArraySortBy <T> (array: T[], getProperty: (value: T) => any): T[] {
    return array.sort((a, b) => {
        let aValue: any = getProperty(a),
            bValue: any = getProperty(b);

        if (aValue === undefined || bValue === undefined) {
            return 0;
        }

        return (aValue > bValue ) ? 1 : ((bValue  > aValue) ? -1 : 0);
    });
}