List.copy
copy($options = {}) -> list
Description
Copy the List into a new List.
Any items that are Lists or Maps will also be copied, recursively.
$list1 = [1, 2, 3] $list2 = $list1.copy() $list1[1] = 11 $list2[1] = 22 print($list1) //= [11, 2, 3] print($list2) //= [22, 2, 3]
Options
| Option | Value | Description |
|---|---|---|
refs |
true/false | All child List or Map objects will use references instead of duplicated copies. This is more memory efficient, but can result in hard-to-find bugs. We recommend only using this for very large data structures. |
$list1 = [
{ num: 111 },
{ num: 222 },
]
$list2 = $list1.copy(-refs)
// This will ALSO change the value in the original list
$list2[1].num = 999
$list1[1].num
//= 999