function stringConvert()
{
  var a = [];
  var s1 = "F", s2 = "1.3", s3 = "5";
  for (var i = 0; i < 10; i++) {
    a[0] = 1 >> s1;
    a[1] = 10 - s2;
    a[2] = 15 * s3;
    a[3] = s3 | 32;
    a[4] = s2 + 60;
    // a[5] = 9 + s3;
    // a[6] = -s3;
    a[7] = s3 & "7";
    // a[8] = ~s3;
  }
  return a.toString();
}
assertEq(stringConvert(), "1,8.7,75,37,1.360,,,5");