| -------concat Small------------- |
| - concat 101, 102, 103, 104, 105 |
| length: 2147483647 |
| 2147483641: 100 |
| 2147483642: 101 |
| 2147483643: 102 |
| 2147483644: 103 |
| 2147483645: 104 |
| 2147483646: 105 |
| - arr.concat(arr) |
| length: 4294967294 |
| 2147483641: 100 |
| 2147483642: 101 |
| 2147483643: 102 |
| 2147483644: 103 |
| 2147483645: 104 |
| 2147483646: 105 |
| 4294967288: 100 |
| 4294967289: 101 |
| 4294967290: 102 |
| 4294967291: 103 |
| 4294967292: 104 |
| 4294967293: 105 |
| -------test prototype lookup------------- |
| a: 200,101,202,203,204,105,106,207 |
| r: 200,101,202,203,204,105,106,207,300,301,302,303,304 |
| r: 200,101,202,203,204,105,106,207,108,301,302,303,304 |
| r: 200,101,202,203,204,105,106,207,,301,302,303,304 |
