#swifttip search results

#SwiftTip: Use the reduce() method to combine all elements of an array into a single value. ```swift let numbers = [1, 2, 3, 4, 5] let sum = numbers.reduce(0, +) // 15 ``` #Swift

#Swift Tip 💡 #SwiftTip 💡 Initialize an array with a specified size using the `init(repeating:count:)` initializer. Example: ```swift let array = Array(repeating: "Swift", count: 3) // ["Swift", "Swift", "Swift"] ```

#Swift tip: Use the `reduce` method to iterate over an array and apply a transformation to each element. Here's an example: let numbers = [1, 2, 3, 4, 5] let sum = numbers.reduce(0, +) // Result: 15 #SwiftTip #ArrayManipulation #FunctionalProgramming

**Swift** #swiftTip: Use `reduce` to iterate over a collection and accumulate a single value. ```swift let numbers = [1, 2, 3, 4, 5] let sum = numbers.reduce(0, +) print(sum) // 15 ``` #Swift #programming #dev

Swift tip ⚡️: For a quick debug print, use `print(thing, terminator: "")` to print to the same line instead of a new line. You can follow it up with `print()` to return to a new line. #swift #swiftlang #swifttip

#SwiftTip: Use the ?? operator to unwrap an optional value safely. If the value is nil, the default value will be used. Example: ```swift let name: String? = nil let displayName = name ?? "Unknown" // displayName will be "Unknown" ```

Foundation's partition(by:) is useful if we want to divide a collection into two parts and operate on both sub-collections. Example could be partitioning index paths and calling UITableView reloadRows for one part and reconfigureRows for the other part. #swifttip #iosdev

When dealing with shared instances, sometimes it makes sense to introduce static subscript for skipping typing .shared everywhere. #swifttip #iosdev

Using enums over structs for namespacing static constants. Nicer since we can't create an instance of AppConstants nor AppConstants.URLs. More Swift tips: bit.ly/swifttips #swiftlang #swifttip

Destructuring a tuple is a short way to extract values from tuples in Swift #swifttip #swiftlang #iosdev

In addition to functions and properties, we can add init methods to protocols in Swift. In that case the comforming non-final class needs use the “required” modifier. This ensures that the init is explicitly implemented by the class or its subclasses. #swifttip #swiftlang #iosdev

Keep your code efficient and clean with #SwiftTip🚀 #iOSDev

Reduce boilerplate and harness the power of protocol-oriented programming in #Swift! protocol Identifiable { var id: Int { get set } } Now each of your models can conform and be 'identifiable'! #SwiftTip 🤓

Swift 5.9 added sleep(for:) to the Clock protocol rather than having to define an instant. github.com/apple/swift-ev… #swifttip #swiftlang #iosdev

Combat #carpetstains like a pro with this #swifttip! 🧼 When spills happen, act fast. Gently blot the area using a clean cloth or paper towel. Begin from the outer edges and work your way toward the center to avoid #spreading the stain. Quick action, lasting cleanliness! ✨🛋️

If a function in Swift has multiple defer statements then these run in a reverse order. Something to keep in mind if the order is happens to be important. #swifttip #swiftlang #iosdev

In Swift 5.8 we can opt-in to a new #file behavior where it equals to the module_name/file_name instead of the full path. Useful when implementing custom logging functions. #swifttip #iosdev #swiftlang

Swift 5.8 in Xcode 14.3 implements @backDeployed attribute for adding functionality to older API versions! 👏 #swifttip #iosdev gist.github.com/laevandus/af00…

When using switch for enums with associated values and we do not want to use associated values then we can only write out the case name .error (instead of `.error(_)`) gist.github.com/laevandus/dd1d… #swifttip #iosdev

Adding custom init in an extension keeps the auto-generated init for structs in Swift gist.github.com/laevandus/d541… #swifttip #iosdev

💡 #SwiftTip: Multiple SwiftUI Preview Providers Did you know that you can have any number of #SwiftUI preview providers in a single file? Xcode will group them, pretty print their names, and add a separator.

💡 #SwiftTip: KeyPath-Based Builder 👷‍♂️ Here is a cool trick with #Swift KeyPaths — you can implement a universal Builder pattern once and reuse it everywhere. Great to make your APIs more expressive and readable.

🎯 Swift tip #4: Use dump() for printing out all the properties of a type. Especially useful when the type has a custom description which reveals only some information. #swifttip #swiftlang #xcode #iosdev

Use this code tip if you want trigger some functionality if you get back in your VC AND not the first time you present it 😎💻 #swifttip #iosdev

🎯 Swift tip #7: Comparing boolean conditions with switch instead of if-elseif-elseif-else. Additionally compiler makes sure that all the possible cases are handled. #swifttip #xcode #iosdev

🎯 #unavailable landed with Swift 5.6 and Xcode 13.3 #swifttip #xcode #iosdev

🎯 Swift/iOS/macOS tip #5: HTTPURLResponse has a function for returning localised strings for HTTP status codes. #swifttip #xcode #iosdev #macosengineer

💡 #SwiftTip: Calling `willSet` and `didSet` from initializer By default, `willSet` and `didSet` observers are not called when a property is first initialized. We can overcome this by using the `defer` statement inside the `init` method 👇

🎯 Swift tip #1: Avoid optional when converting data to utf8 string with init(decoding:as:) #swiftlang #swifttip #iosengineer #iosdev

💡#SwiftTip: Result<T, Never> Set Result.Failure type to Never in case error is impossible or can be replaced with a value. E.g., pass an empty array if an array of elements has failed to load. The compiler is smart and does not require us to handle the failure case in switch.

💡 #SwiftTip: Configuring UIAlertControllers Here is a neat way of configuring alert controllers — you can declare a factory method for each style. It cuts boilerplate code, organizes your alerts in one place and makes them more readable.

💡 #SwiftTip: 'Y' vs 'y' formatter 📅 • 'y' specifies the calendar year. • 'Y' specifies the ISO8601 year-week calendar. • Always use 'y' when presenting dates to users. 👍 ISO8601 counts full weeks. In 2021 Jan 1st falls on Friday, thus the mismatch is Dec 29 - 31.

💡 #SwiftTip: Avoiding Degenerate Optional Values Avoid designing your code with `Optional` collections and booleans. Otherwise, you will run into a degenerate case, where it is unclear what does "nothing" mean. Is it an empty array or `nil` array; is it `false` or `nil`?

🔨 Xcode tip #23: Sort files and folders by name by right clicking on a folder and selecting "Sort By Name" #xcodetip #swifttip #iosdev

💡 #SwiftTip Debug Log Optionals without Warnings Remember this problem when you debug log or display an optional value on UI, it prints 'Optional(...)' and gives a warning? The solution is to provide a custom string interpolation for Optional<T>. See the attached screenshot.

📣 Swift Tip 📣 Controla el acceso a tu código. Usa siempre el modificador de acceso apropiado para encapsular tu código. En Swift tienes 3 modificadores: private, internal y public. #SwiftTip #iOS #MiraMiCodigo

🎯 Swift tip #8: Dictionary has a subscript with default value. Useful if accessing the dictionary should return a fallback value when the dictionary key is not present. #swifttip #xcode #iosdev

⏱️Swift 5.7 in Xcode 14 has a new ContinuousClock API which also provides a nice way to measure time of async functions. #swiftlang #swifttip #iosdev

🎯 Optional pattern matching in for loop only loops over non-nil values #swiftlang #swifttip #iosdev

🎯 Swift tip #2: Converting an integer to data and back. Useful when working with raw bytes. #swiftlang #swifttip #xcode #iosengineer #macosengineer #iosdev