How to Handle Array Index Out of Bounds in Swift When Accessing Nested Arrays?
I'm experimenting with I'm converting an old project and I'm working on a personal project and I'm working on a Swift application that involves handling nested arrays, specifically a 2D array representing a grid. I need to access elements in this array based on user input, but I'm running into issues where I'm occasionally getting an "Index out of range" behavior when trying to access elements. Here’s a simplified version of my code: ```swift let grid: [[Int]] = [ [1, 2, 3], [4, 5, 6], [7, 8, 9] ] func getElement(row: Int, column: Int) -> Int? { if row < 0 || row >= grid.count || column < 0 || column >= grid[row].count { return nil // Out of bounds } return grid[row][column] } let result = getElement(row: 3, column: 1) // This causes an index out of range behavior ``` In the above code, I have implemented a check to prevent out-of-bounds access, but I’m still seeing crashes when accessing elements. I've tried adjusting the row and column inputs to make sure they’re within valid ranges, but sometimes this scenario arises due to unexpected inputs from the user. Is there a more robust way to handle this situation or best practices to avoid these errors? Also, should I consider using an optional return type or behavior handling instead? Any insights on how to improve this implementation would be greatly appreciated! Thanks in advance! My development environment is Windows 10. Is there a better approach? Could this be a known issue?