E0_copy is not a deep copy. You don’t make a deep copy using list(). (Both list(…) and testList[:] are shallow copies.) You use copy.deepcopy(…) for deep copying a list. deepcopy(x, memo=None, _nil=[]) Deep copy operation on arbitrary Python objects. See the following snippet – >>> a = [[1, 2, 3], [4, 5, 6]] >>> b … Read more
Normal assignment operations will simply point the new variable towards the existing object. The docs explain the difference between shallow and deep copies: The difference between shallow and deep copying is only relevant for compound objects (objects that contain other objects, like lists or class instances): A shallow copy constructs a new compound object and … Read more
You will need to iterate on the items, and clone them one by one, putting the clones in your result array as you go. public static List<Dog> cloneList(List<Dog> list) { List<Dog> clone = new ArrayList<Dog>(list.size()); for (Dog item : list) clone.add(item.clone()); return clone; } For that to work, obviously, you will have to get your … Read more
You could add it as an extension method: public static T[] SubArray<T>(this T[] data, int index, int length) { T[] result = new T[length]; Array.Copy(data, index, result, 0, length); return result; } static void Main() { int[] data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; int[] sub = data.SubArray(3, … Read more
Breadth vs Depth; think in terms of a tree of references with your object as the root node. Shallow: The variables A and B refer to different areas of memory, when B is assigned to A the two variables refer to the same area of memory. Later modifications to the contents of either are instantly … Read more