# Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more Learn iOS and Swift, Android and Kotlin & Dart and Flutter development with the largest and highest-quality catalog of video courses and books on the Internet. This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## Kodebits Day 94: Operator Overloading \[FREE\] DevFeed: [Kodebits Day 94: Operator Overloading \[FREE\]]() Original publisher: [Read original article]() Published: 2026-09-17T17:00:08Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift](), [Development]() Tags: [article](), [free](), [swift]() ### AI overview A short Swift challenge for practicing operator overloading. ### Source excerpt Practice operators with a short swift challenge. ## Developing Apps for the iPhone Duo: Best Practices and Upcoming iOS 27.1 APIs DevFeed: [Developing Apps for the iPhone Duo: Best Practices and Upcoming iOS 27.1 APIs]() Original publisher: [Read original article]() Author: hococoder Published: 2026-09-17T15:00:52Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [iphone](), [iOS](), [API](), [Xcode]() Tags: [api](), [apple](), [apps](), [article](), [best-practices](), [developing](), [features](), [free](), [ios](), [iphone]() ### AI overview This article discusses best practices for preparing apps for the iPhone Duo and previews API changes planned for iOS 27.1. It highlights size classes, screen changes, and other hardware and interface considerations while noting that Xcode does not yet support the device. ### Source excerpt Learn about best practices for developing for the iPhone Duo, and get a sneak peek at the upcoming API changes in iOS 27.1, specifically for the Duo! ## Kodebits Day 93: Default Parameter \[FREE\] DevFeed: [Kodebits Day 93: Default Parameter \[FREE\]]() Original publisher: [Read original article]() Published: 2026-09-15T18:00:07Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift]() Tags: [article](), [free](), [swift]() ### AI overview A short Swift challenge focused on practicing functions and default parameters. ### Source excerpt Practice functions with a short swift challenge. ## Kodebits Day 92: Collection For Loop \[FREE\] DevFeed: [Kodebits Day 92: Collection For Loop \[FREE\]]() Original publisher: [Read original article]() Published: 2026-09-14T18:00:05Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Dart]() Tags: [article](), [dart](), [free]() ### AI overview A short free Kodeco challenge for practicing collection for loops in Dart. ### Source excerpt Practice collections with a short dart challenge. ## Kodebits Day 91: Property Observer \[FREE\] DevFeed: [Kodebits Day 91: Property Observer \[FREE\]]() Original publisher: [Read original article]() Published: 2026-09-13T17:00:05Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift]() Tags: [article](), [development](), [free](), [learn](), [swift]() ### AI overview A short Swift challenge focused on practicing property observers. ### Source excerpt Practice properties with a short swift challenge. ## Moving from XCTest to Swift Testing \[FREE\] DevFeed: [Moving from XCTest to Swift Testing \[FREE\]]() Original publisher: [Read original article]() Author: renan.dias Published: 2026-09-11T18:41:42Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift Testing](), [Unit testing](), [Xcode](), [agentic-coding](), [SwiftUI](), [iOS]() Tags: [agentic](), [agentic-ai](), [app](), [apple](), [article](), [free](), [how-to](), [ios](), [swift-testing](), [swiftui](), [testing](), [xcode]() ### AI overview A tutorial on migrating unit tests from Apple's XCTest framework to Swift Testing. It explains common testing scenarios, Swift Testing's newer syntax and constructs, and how Xcode's Agentic Coding can assist with the migration while working on a SwiftUI coffee-ordering app. ### Source excerpt Swift Testing is Apple's replacement for the objective-C XCTest unit testing framework. Discover how to migrate your existing XCTest suites over to Swift Testing, including how to get some assistance from Xcode's agentic AI tooling. ## Kodebits Day 90: Named Arguments \[FREE\] DevFeed: [Kodebits Day 90: Named Arguments \[FREE\]]() Original publisher: [Read original article]() Published: 2026-09-10T17:00:05Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Kotlin]() Tags: [article](), [development](), [free](), [kotlin]() ### AI overview A short Kotlin challenge for practicing named arguments. ### Source excerpt Practice arguments with a short kotlin challenge. ## Kodebits Day 89: Enum Raw Values \[FREE\] DevFeed: [Kodebits Day 89: Enum Raw Values \[FREE\]]() Original publisher: [Read original article]() Published: 2026-09-09T16:00:04Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift]() Tags: [article](), [development](), [free](), [swift]() ### AI overview A short, free Kodeco challenge for practicing Swift enums with raw values. ### Source excerpt Practice enums with a short swift challenge. ## Kodebits Day 88: Inout Parameter \[FREE\] DevFeed: [Kodebits Day 88: Inout Parameter \[FREE\]]() Original publisher: [Read original article]() Published: 2026-09-07T17:00:59Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift]() Tags: [article](), [development](), [free](), [learn](), [swift]() ### AI overview A short Kodeco challenge focused on practicing Swift functions and the inout parameter. ### Source excerpt Practice functions with a short swift challenge. ## Kodebits Day 87: Default Parameters \[FREE\] DevFeed: [Kodebits Day 87: Default Parameters \[FREE\]]() Original publisher: [Read original article]() Published: 2026-09-06T16:00:57Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Kotlin]() Tags: [article](), [development](), [free](), [kotlin](), [learn]() ### AI overview A short Kotlin challenge focused on practicing default parameters. ### Source excerpt Practice parameters with a short kotlin challenge. ## Kodebits Day 86: Computed Property \[FREE\] DevFeed: [Kodebits Day 86: Computed Property \[FREE\]]() Original publisher: [Read original article]() Published: 2026-09-04T17:00:55Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift]() Tags: [article](), [development](), [free](), [swift]() ### AI overview A short Swift challenge focused on practicing computed properties. ### Source excerpt Practice properties with a short swift challenge. ## Kodebits August 2026: Kotlin Takes the Lead \[FREE\] DevFeed: [Kodebits August 2026: Kotlin Takes the Lead \[FREE\]]() Original publisher: [Read original article]() Author: samdavies Published: 2026-09-03T19:54:55Z Content type: article Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Kotlin](), [Android](), [Swift](), [Dart]() Tags: [2026](), [android](), [article](), [beginner](), [comparison](), [dart](), [free](), [kotlin](), [swift]() ### AI overview Kodebits August 2026 presents 18 programming puzzles grouped by platform and ordered from beginner to advanced. Kotlin leads the month with eight entries, followed by Swift with seven and Dart with three. The Kotlin material covers everyday topics including collections, ranges, string templates, null safety, and type checking, while the roundup also highlights comparisons across Kotlin, Swift, and Dart. ### Source excerpt Kotlin outnumbered Swift for the first time in August, and the month eased off after July's hard streak. Here's all 18 bits grouped by platform and sorted from beginner to advanced. ## Kodebits Day 85: Type Check As Cast \[FREE\] DevFeed: [Kodebits Day 85: Type Check As Cast \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-31T18:00:49Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Kotlin]() Tags: [article](), [development](), [free](), [kotlin](), [learn]() ### AI overview A short Kodeco challenge for practicing Kotlin type checks. ### Source excerpt Practice type checks with a short kotlin challenge. ## Kodebits Day 84: Reduce Product \[FREE\] DevFeed: [Kodebits Day 84: Reduce Product \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-29T16:00:27Z Content type: article Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift]() Tags: [article](), [books](), [catalog](), [development](), [free](), [learn](), [swift]() ### AI overview A short Swift challenge focused on practicing higher-order functions, presented as part of Kodeco's mobile development learning content. ### Source excerpt Practice higher-order functions with a short swift challenge. ## Kodebits Day 83: Smart Cast \[FREE\] DevFeed: [Kodebits Day 83: Smart Cast \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-28T18:00:52Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Kotlin]() Tags: [article](), [free](), [kotlin](), [learn]() ### AI overview A short Kotlin challenge about smart casts and type checks. It explains that after an `is` check, Kotlin treats the value as the checked type within the `if` block, allowing direct access to String properties such as `.length`. ### Source excerpt Practice type checks with a short kotlin challenge. ## Kodebits Day 82: Stride By Value \[FREE\] DevFeed: [Kodebits Day 82: Stride By Value \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-26T18:00:50Z Content type: article Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift]() Tags: [article](), [development](), [free](), [swift]() ### AI overview A short Swift challenge focused on practicing loops. ### Source excerpt Practice loops with a short swift challenge. ## Kodebits Day 81: Guard Multiple Bindings \[FREE\] DevFeed: [Kodebits Day 81: Guard Multiple Bindings \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-25T18:00:49Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift](), [iOS]() Tags: [article](), [development](), [free](), [swift]() ### AI overview A short Swift challenge focused on practicing guard with multiple bindings. ### Source excerpt Practice guard with a short swift challenge. ## Kodebits Day 80: Safe Call Operator \[FREE\] DevFeed: [Kodebits Day 80: Safe Call Operator \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-23T16:00:47Z Content type: article Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Kotlin]() Tags: [article](), [development](), [free](), [kotlin](), [learn]() ### AI overview A short Kotlin challenge for practicing null-safety and the safe call operator. ### Source excerpt Practice null-safety with a short kotlin challenge. ## Kodebits Day 79: Collection If \[FREE\] DevFeed: [Kodebits Day 79: Collection If \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-20T16:00:46Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Dart]() Tags: [article](), [dart](), [development](), [free](), [learn]() ### AI overview A short Dart challenge focused on practicing collection if statements. ### Source excerpt Practice collection if with a short dart challenge. ## Kodebits Day 78: Switch Where Clause \[FREE\] DevFeed: [Kodebits Day 78: Switch Where Clause \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-18T18:00:44Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift]() Tags: [article](), [development](), [free](), [swift]() ### AI overview A short coding challenge for practicing Swift switch statements with a where clause. ### Source excerpt Practice switch statements with a short swift challenge. ## Kodebits Day 77: Optional flatMap \[FREE\] DevFeed: [Kodebits Day 77: Optional flatMap \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-17T16:00:42Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift]() Tags: [article](), [development](), [free](), [swift]() ### AI overview A short, free Kodeco challenge for practicing Swift optionals with flatMap. ### Source excerpt Practice optionals with a short swift challenge. ## Kodebits Day 76: Elvis Operator \[FREE\] DevFeed: [Kodebits Day 76: Elvis Operator \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-15T18:00:41Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Kotlin](), [Android]() Tags: [article](), [development](), [free](), [kotlin](), [learn]() ### AI overview A short Kotlin challenge for practicing null safety, presented as part of Kodeco's mobile development learning content. ### Source excerpt Practice null-safety with a short kotlin challenge. ## Kodebits Day 75: Range Iteration \[FREE\] DevFeed: [Kodebits Day 75: Range Iteration \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-13T18:00:39Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Swift]() Tags: [article](), [development](), [free](), [swift]() ### AI overview A short, free Kodebits challenge focused on practicing range iteration in Swift. ### Source excerpt Practice ranges with a short swift challenge. ## Kodebits Day 74: Lateinit Property \[FREE\] DevFeed: [Kodebits Day 74: Lateinit Property \[FREE\]]() Original publisher: [Read original article]() Published: 2026-08-12T14:00:38Z Content type: tutorial Language: en Sources: [Kodeco | High quality programming tutorials: iOS, Android, Swift, Kotlin, Unity, and more]() Topics: [Kotlin]() Tags: [article](), [development](), [free](), [kotlin]() ### AI overview A short Kotlin challenge for practicing the lateinit property. ### Source excerpt Practice lateinit with a short kotlin challenge. 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