## 01
`obj_ary === obj_ary_copy``obj_ary[0]``obj_ary_copy[0]`
****
## 02
****
const obj_ary_copy = obj_ary;
`obj_ary_copy``obj_ary`
`obj_ary[0] = {'ccc': 300};` `obj_ary_copy[0]``{'ccc': 300}``const obj_ary_copy = [...obj_ary];`
* * *
()