How to solve 'Thread 1: Fatal error: Index out of range' in a two dimensional array

Question

I'm getting a crash when launching my app 'Thread 1: Fatal error: Index out of range'. Full error:

Fatal error: Index out of range: file /Library/Caches/com.apple.xbs/Sources/swiftlang/swiftlang-1103.2.25.8/swift/stdlib/public/core/ContiguousArrayBuffer.swift, line 444
2020-07-11 14:04:40.909080+0200 Carrot[13983:705959] Fatal error: Index out of range: file /Library/Caches/com.apple.xbs/Sources/swiftlang/swiftlang-1103.2.25.8/swift/stdlib/public/core/ContiguousArrayBuffer.swift, line 444
(lldb) 

Could anyone give me directions in how I can solve this error? I'm getting the error on this line:

return twoDArray[section].items.count

This is my full ViewController file:

class TableViewController: UITableViewController, AddTask, ChangeButton {
    
var sections = FoodData.foodCategories

var twoDArray = [
    Section(isExpanded: true, items: [Task(name: "No items yet")]), Section(isExpanded: true, items: [Task(name: "No items yet")]), Section(isExpanded: true, items: [Task(name: "No items yet")]), Section(isExpanded: true, items: [Task(name: "No items yet")]), Section(isExpanded: true, items: [Task(name: "No items yet")]), Section(isExpanded: true, items: [Task(name: "No items yet")]), Section(isExpanded: true, items: [Task(name: "No items yet")]), Section(isExpanded: true, items: [Task(name: "No items yet")]), Section(isExpanded: true, items: [Task(name: "No items yet")]),
    ]

// MARK: - TableView data source

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    
    if section == 0 {
        return 1
    }
    
    return twoDArray[section].items.count
}

And here is the FoodData struct:

struct FoodData {
static let foodCategories = ["New item", "Produce 🍅", "Meat 🥩", "Breakfast 🍞", "Seafood 🐟", "Dairy 🥛", "Frozen 🧊", "Drinks 🥤", "Snacks 🍿", "Grains", "Cans & Jars 🥫", "Spices", "Sauces & Oils", "Paper", "Cleaning", "Personal", "Baking 🥧", "Other"]

}

Answer 1

The problem is caused by code you didn’t show. You are returning a too big number in numberOfSections.