rockbad.blogg.se - Arraylist kotlin

Overhead: ArrayList has a small amount of overhead compared to arrays, which can affect performance in certain situations. Here are some advantages and disadvantages of using an ArrayList in Kotlin:ĭynamic resizing: Unlike arrays, ArrayList can resize dynamically, which means you can add or remove elements from the list as needed.įlexible storage: ArrayList can store objects of any type, making it useful for storing collections of heterogeneous data.Įasy manipulation: ArrayList provides a variety of methods for adding, removing, and manipulating elements in the list, making it easy to work with. ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.

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Val p2 = arrayOf(arrayOf(Person("John", 20), Person("Mary", 15)))Īssertions.assertTrue(p1 contentDeepEquals p2) 6. Moreover, we can also validate the structural equality for nested arrays holding objects of Person type using the contentDeepEquals function: data class Person (var name: String?, var age: Int?) We can solve this problem by defining the Person class as a data class: data class Person (var name: String?, var age: Int?)Īssertions.assertTrue(first contentEquals second)Īs a data class inherently defines the equals() method for value comparison, we can assert that the first and second arrays containing objects of Person type are structurally equal.

That’s because we haven’t defined the equals() method in the Person class, and as a result, the contentEquals function is, by default, doing a referential equality check. Val second = arrayOf(Person("John", 20), Person("Mary", 15))įor such scenarios, the contentEquals function won’t be able to make a structural comparison of the arrays: Assertions.assertFalse(first contentEquals second)

Val first = arrayOf(Person("John", 20), Person("Mary", 15)) Let’s define a Person class and initialize two arrays that contain instances of the Person class: class Person (var name: String?, var age: Int?)

Now, let’s go ahead and expand our understanding to compare arrays that contain user-defined objects. So far, we’ve seen array comparisons for String values.