kotlin data class equals
Example of a data. Kotlin - Data Classes In this chapter we will learn about Kotlin Data Classes.
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They are consistent if you.
. For example on JVM KClass instances for a primitive type int and the corresponding. In Kotlin this type of class is known as data class and is marked as data. For example among the Data class is one of the concepts and features for storing and hold the data and state with the help of some standard keywords and methods.
In order to define a class as a data class in Kotlin it should satisfy the requirements below. If the classes represent Array then Class objects of their element types are equal. The primary constructor should have at least one parameter.
The compiler automatically generates the following functions for data classes. In the POJO class we just create fields and settergetter methods to set and. 1 is not equal to 10 and 10 is not equal to 10F.
Equals method return true if two objects. In Kotlin these are called data classes and are marked with data. Notice that similar classes are not equal to each other in Kotlin.
In Kotlin there are two types of equality. Equals and hashCode toString of the form Book. A useful toString.
It is not unusual to create classes whose main purpose is to hold data. The point I was making was that currently as implemented in Kotlin 13 for the data class shown equals and hashCode are not really consistent. These are different types and they are not even comparable.
In domain-driven design development simple class as bean or POJO or model class in Java. A Kotlin Data Class is used to hold the data only and it does not provide any other functionality apar. Equals and hashCode methods.
Referential equality - two references point to the same object. 一個data class中會有多個屬性可以看成是這個類別中夾帶的資料使用equals來比較兩個data class的實例時它比較的並不是記憶體位址而是在比較兩個實例. Structural equality - a check for equals.
Kotlin data classes are useful for this purpose. Kotlin Data class automatically creates the following functions for you. Data class Studentval name.
Kotlin Data Class built-in methods.
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