0,1,2,3 | |
1,2,3 | |
1,2,3 | |
4 | |
0,1,2,3 | |
a,b,c,0,1,2,3 | |
1 | |
1 | |
2 | |
2 | |
1 | |
3 | |
undefined | |
0 | |
3 | |
2 | |
4 | |
5 | |
5 | |
5 | |
6 | |
7 | |
2 | |
3 | |
undefined | |
undefined | |
0 | |
3 | |
3 | |
3 | |
--- unshift 0 | |
3 | |
100,101,102 | |
--- unshift 1 | |
RangeError : Array length must be assigned a finite positive integer | |
length: 4294967295 | |
0: 200 | |
1: 201 | |
2: 202 | |
3: 203 | |
4294967294: 100 | |
4294967295: 101 | |
4294967296: 102 | |
4294967298: 104 | |
4294967299: 109 | |
Test: unshift should throw when length is not writable. | |
e instanceOf TypeError = true | |
a.length = 1 |