Data classes - Kotlin Vocabulary

[@sayitsjose]

Are data classes isomorphic to structs in Swift? @2:21 The jump from pointing out that varargs aren't supported in a data class to the quote from Andrey Breslav was a bit of a leap. Isn't it enough to say varargs are arrays which live in the heap? @4:47 What are synthetic methods? It sounds like copy and copy$default both share the same semantics.

[@atanasdoychinov6491]

The data class sounds so good to be used for creating of models, but without the inheritance its use is so limited...

[@pradeepkumarreddykondreddy7048]

Is destructuring allowed only for data classes ?

no. any class with the methods componentN (where N is a number >= 1) can be destructured. the number of variables you use in the left hand side of the assignment must match the number of componentN methods available in that class (e.g. val (x, y, z) = obj; only works if the class of obj has component1(), component2() and component3()). the data classes get those methods generated automatically for every parameter specified in its constructor, that's why it's easier with them. but it's allowed for any class [which matches the criteria above].

[@siddharthchughs100]

Hi , The videos is really good for good understanding for the data classes, but Would like to know , if we need to use the same class in the sqlite using kotlin , how to insert the data into the respective variables, as of when all the data items were kept val the sqlite was showing error and was suggesting convert the data item into the var and then was able to add all the data into the variables, therefore it was easy to show in the recyclerview using kotlin for the android application. In that case advice please, Thanks

[@GemiDroid]

So great video, but I am wondering what's the benefits of making data class final?

[@kolenyov]

discuss.kotlinlang.org/t/data-class-inheritance/4107/2 Inheriting a data class from another data class is not allowed because there is no way to make compiler-generated data class methods work consistently and intuitively in case of inheritance.

[@GemiDroid]

@@kolenyov Thanks I got it 👍

[@MaisUmSomente]

windows Ctrl +Shift+A show Kotlin Bytecode action. 02:54

[@willculpepper9637]

All aboard for NotNullNovember

[@mindfulnessrock]

You haven't really gotten into its restriction that much, or even like real life scenario of where they fit the best, instead of of regular classes. Great anatomical explanation still!

[@samuelrake7832]

Whenever i remember the way data classes made me write less code when creating recyclerviews compared to java.. i sigh in relief

[@RahulPahuja1991]

do u mean we cannot have a parent child relationship for a data class?

[@kosmozaut]

Correct and it kinda sucks

[@amir32806]

For some reason it compiles as a final class in Java

[@farazahmed7]

Inheritance should never be the first option. Kotlin strictly follows Composition over inheritance as it should be. Do read more about this and you will understand why Kotlin classes are final by default.

[@febaisi1]

I am still not exactly sure why Data Classes can't inherit from another Data class. ;/

[@AmitJayant]

The weirdest syntax in all of Programming languages

[@xpopcornx1747]

again?

[@gabormiklay9209]

I wonder what breed of doggo Florina has... 🤔

[@rayanfernandes2631]

Why make data class if we can make class with data attributes

[@ytechnology]

Not an expert here, but I've used data classes to hold return values from functions that return multiple values.

[@kolenyov]

Benefits of the autogenerated methods like components() for destructive declaration and copy() for an immutability.