Print a numbers within a range with a particular offset

Range.ts

class Range {
    static ID:string = 'range';

    static filter() {
        return (num:number, offset:number = 1) => {
            var res = [];
            for (var i = offset; i <= num; i = i + offset) {
                res.push(i);
            }
            return res;
        };
    }
}