class regular{
    pattern: string;
    str: string;
    exp(pattern, str) {
        this.pattern = pattern;
        this.str = str;
        var result: any[] = this.str.match(pattern);
        this.pattern.test(this.str);
        var n=this.str.search(/d/);
        console.log(n);
        return result;
    }
}
var o = new regular();
var res: any[] = o.exp(/[0-9]/, "sri3d5ha7r");
console.log(res);