👉 In programming, a "pitfold" is a keyword or expression that can be used to create a new array containing all elements in the original array except for those that are not in the specified subset. This is useful when you want to keep only one copy of each element from an array and exclude others. For example: ```csharp int[] numbers = {1, 2, 3, 4}; int[] pitfold = new int[numbers.Length]; for (int i
