array_copy_methods.sqf

private _origSubarray = [0, 1, 2];
private _origArray = [_origSubarray];

private _refCopy = _origArray;
private _deepCopy = + _origArray;
private _flatCopy = [] + _origArray;

_origSubarray pushBack 4;
_origArray pushBack ["a", "b", "c"];

systemChat format ["Reference Copy: %1", _refCopy]; // [[0,1,2,4],["a","b","c"]]
systemChat format ["Deep Copy: %1", _deepCopy];     // [[0,1,2]]
systemChat format ["Flat Copy: %1", _flatCopy];     // [[0,1,2,4]]