How to loop through an array of structs in Swift?

question swift
Ram Patra Published on November 17, 2023

Looping through an array of structs in Swift is straightforward and can be done in several ways depending on what you need to achieve. Here’s how to do it:

  1. Basic For-In Loop: This is the most common way to loop through an array. It gives you each struct in the array one by one.

    struct MyStruct {
        // struct definition
    let arrayOfStructs: [MyStruct] = [/* your array elements */]
    for structItem in arrayOfStructs {
        // Do something with 'structItem'

    In this example, structItem is a variable that represents each struct in the array as the loop iterates over it.

  2. For-In Loop with Index and Element: If you need the index of each element along with the element itself, you can use the enumerated() method.

    for (index, structItem) in arrayOfStructs.enumerated() {
        // You can use 'index' and 'structItem' here

    enumerated() provides a sequence of pairs (index, element).

  3. Using forEach Method: The forEach method is another way to iterate over an array. Unlike the for-in loop, you cannot use break or continue to exit early or skip iterations.

    arrayOfStructs.forEach { structItem in
        // Do something with 'structItem'
  4. Using Higher-Order Functions (for Specific Tasks): If you need to perform specific operations like filtering, mapping, or reducing, you can use higher-order functions.

    // Example: Filtering
    let filteredArray = arrayOfStructs.filter { /* condition */ }
    // Example: Mapping
    let mappedArray = arrayOfStructs.map { /* transform each item */ }

Each of these methods serves a different purpose. Choose the one that best fits the task you are trying to accomplish. For simple iteration, the basic for-in loop is usually sufficient. If you need more complex operations, consider using higher-order functions.

Ram Patra Published on November 17, 2023
Image placeholder

Keep reading

If this article was helpful, others might be too

June 7, 2020 How to add Global Key Shortcuts to your macOS app using MASShortcut

Adding Global Keyboard Shortcuts to your macOS app can be a pain as there isn’t a Cocoa API for the same. You would have to rely on the old, most of which are deprecated, Carbon API.

question swift November 16, 2023 How to check whether a value is not nil in Swift and assign it to a variable at the same time?

In Swift, there are several ways to check for nil and assign a value to a variable, depending on the context and what you want to achieve. Here are some common approaches:

question swiftui swift September 30, 2023 How to open the Settings view in a SwiftUI app on macOS 14.0 (Sonoma)?

In macOS 14.0 (Sonoma), Apple removed support for NSApp.sendAction to open the Settings view in your SwiftUI app. You now have to use SettingsLink like below: