👉 In computer science, an "erasure" is a data operation that removes or replaces some of the data in a list or array. It's similar to deleting something from a pile of items; it involves removing one item at a time. This process is used when you want to discard parts of your data without changing its order. For example, suppose you have an array `arr` with elements `[1, 2, 3, 4]`. You might want to erase all the
