Kotlin Generics - How to create generic classes скачать в хорошем качестве

Kotlin Generics - How to create generic classes

Learn HOW and WHEN to use GENERIC CLASSES in Android Kotlin in this video! Want to learn everything about Kotlin? Get this!    • Android Complete Course   Here are the links by the way! Free download. https://page.tutorials.eu/android Our Android Masterclass. https://bit.ly/3l6vG86 We´ll make sure to make a Developer out of you In no time! ☕ You can also support us now by buying us a coffee! ☕ https://www.buymeacoffee.com/tutorialsEU And we promise to create more cool content for you! Access your classes, methods and properties using different datatypes without compromising on compile-time type safety using generics! A generic type is a class or method that is parameterized over types. We always use angle brackets () to specify the type parameter in the program. One of the trickiest aspects of Java's type system is the wildcard types (see Java Generics FAQ). Kotlin doesn't have these. Instead, Kotlin has declaration-site variance and type projections. Let's think about why Java needs these mysterious wildcards. The problem is explained well in Effective Java, 3rd Edition, Item 31: Use bounded wildcards to increase API flexibility. First, generic types in Java are invariant, meaning that List String is not a subtype of List Object . If List were not invariant, it would have been no better than Java's arrays. It is very easy to declare a type parameter T as out and avoid trouble with subtyping on the use site, but some classes can't actually be restricted to only return T's! Classes aren’t the only declarations that can have type parameters. Functions can, too. Type parameters are placed before the name of the function. The set of all possible types that can be substituted for a given type parameter may be restricted by generic constraints. The type safety checks that Kotlin performs for generic declaration usages are done at compile time. At runtime, the instances of generic types do not hold any information about their actual type arguments. The type information is said to be erased. Check out the video to learn more! TAGS. Android tutorial,android tutorial for beginners,android how to,Denis Panjuta android,Tutorials,Tutorial,Programming,Course,Learn,Step by step,guide,development,programmer,video course,video tutorial,learn how to,how to,Udemy,Denis Panjuta,kotlin android tutorial,android kotlin tutorial,kotlin generics,generics kotlin,kotlin typed parameters,kotlin tutorial for beginners,kotlin oop,oop kotlin,kotlin object oriented programming,android development,generics tutorialsEU offers you free video tutorials about programming and development for complete beginners up to experienced programmers. This includes C#, Unity, Python, Android, Kotlin, Machine Learning, etc. Stay tuned and subscribe to tutorialsEU: https://goo.gl/rBFh3x Android:    / @tutorialseuandroid   C#:    / @tutorialseuc   Unity:    / @tutorialseuunity   Facebook:   / tutorialseu-109380204093233   LinkedIn:   / tutorialseu   Discord:   / discord