dirs:=T("/home/user1/tmp/coverage/test", "/home/user1/tmp/covert/operator",
        "/home/user1/tmp/coven/members");
n:=Utils.zipWith('==,dirs.xplode()).find(False); // character pos which differs
n=dirs[0][0,n].rfind("/");  // find last "/"
dirs[0][0,n];