| Array.isArray(x): true | |
| x.length: 3 | |
| x === y: true | |
| x.baz: 5 | |
| x[0]: 3 | |
| y[1]: null | |
| x[5]: undefined | |
| post update -- y[1]: non-null | |
| post update -- x[5] !== null: true | |
| post update -- x[5].bar: 3 | |
| post update -- y[6]: 10 | |
| q.length: 5 | |
| q[3]: undefined | |
| qq.length: 3 | |
| qq[3]: undefined | |
| qqq.length: 5 | |
| qqq[3]: undefined | |
| a[o]: 50 | |
| a[o1]: 50 | |
| a["[object Object]"]: 50 | |
| a["[object" + " Object]"]: 50 |