Learn why we can’t use late-initialized properties and variables for primitive types in Kotlin
Baeldung Author
Ali Dehghani
Has a BSc in Chemical Engineering and MSc in Information Technology. Except for the major change, nothing else has changed, still, a computer geek who is passionate about all aspects of software engineering looks for elegant and possibly new solutions, eager to learn and hopefully help fellow software geeks to do so.
Here's what I've written (so far):
Baeldung on Kotlin
- All
- Kotlin Collections (9)
- Kotlin Strings (8)
- Kotlin Basics (7)
- Kotlin Classes and Objects (6)
- Kotlin-Java Interop (3)
- Kotlin Functions (3)
- Functional Programming (3)
- Kotlin IO (2)
- Kotlin Concurrency (1)
- Kotlin (1)
The Difference Between init Block and Constructor in Kotlin
Filed under Kotlin Classes and Objects
Learn the difference between init blocks and constructors in Kotlin along with a peek at the generated bytecode for each case
Returning Multiple Values From Kotlin Functions
Filed under Kotlin Functions
Learn how to use built-in types such Pair and Triple, collection types and arrays, and finally, data classes, to return multiple values.
Writing InputStream to File in Kotlin
Filed under Kotlin IO
Learn a few approaches to copy the contents of an InputStream to a file in Kotlin.
A Guide to @Throws in Kotlin
Filed under Kotlin-Java Interop
Learn how the @Throws annotation facilitates calling Kotlin methods and functions from Java
Removing Duplicate Elements From Collections in Kotlin
Filed under Kotlin Collections
Learn two approaches to remove duplicate elements from a collection or array
Copying a List in Kotlin
Filed under Kotlin Collections
Learn a couple of ways to copy the contents of a List to another one in Kotlin
Removing All Non-Alphanumeric Characters in Kotlin
Filed under Kotlin Strings
Learn a few ways to remove all non-alphanumeric characters from a string in Kotlin
Copy a Map in Kotlin
Filed under Kotlin Collections
Learn a couple of ways to copy the contents of a Map to another one in Kotlin
Difference Between crossinline and noinline in Kotlin
Filed under Functional Programming
Learn about two consequences of lambda function inlining in Kotlin: noinline and crossinline
Functions for Replacing Part of a String in Kotlin
Filed under Kotlin Strings
Learn a handful of ways to replace part of a string with something else in Kotlin
“Val cannot be reassigned” Issue on Function Parameters in Kotlin
Filed under Functional Programming
Learn that function parameters are immutable in Kotlin
Creating a New Instance from a KClass in Kotlin
Filed under Kotlin Classes and Objects
Learn a few ways to instantiate Kotlin objects with the help of reflection and KClass tokens
The Difference Between map() and flatMap() in Kotlin
Filed under Functional Programming, Kotlin Collections
Learn the subtle differences between map() and flatMap() in Kotlin
Creating Collections with Repeating Elements in Kotlin
Filed under Kotlin Collections
Learn how to create different collections such as Lists, MutableLists, or even Arrays with repeating elements in them
The getClass() Equivalent in Kotlin
Filed under Kotlin Classes and Objects, Kotlin-Java Interop
Learn how to retrieve the KClass token in Kotlin
The @JvmStatic Annotation in Kotlin
Filed under Kotlin IO, Kotlin-Java Interop
Learn how the @JvmStatic annotation affects the generated JVM bytecode
Get All Subclasses of a Sealed Class in Kotlin
Filed under Kotlin Classes and Objects
Learn how to find all subclasses of a particular sealed class in Kotlin
Splitting a String in Kotlin
Filed under Kotlin Strings
Learn a couple of ways to split Strings into a sequence of elements in Kotlin
IntArray vs Array<Int> in Kotlin
Filed under Kotlin Collections
Learn how primitive arrays and their corresponding parameterized Array types are different in terms of JVM representation and API
Read Environment Variables in Kotlin
Filed under Kotlin Basics
Learn how we can have access to the system environment variables in Kotlin
Convert Int to Hex String in Kotlin
Filed under Kotlin Strings
Learn a few ways to convert integers to their corresponding hexadecimal values
Difference Between List and Array in Kotlin
Filed under Kotlin Collections
Compare Array and List types in Kotlin
Converting String to Int in Kotlin
Filed under Kotlin Strings
Learn how to convert Kotlin Strings to their corresponding Int values
Checking if a String is Empty in Kotlin
Filed under Kotlin Strings
Learn how to check if a string is empty or blank
Convert Array to List in Kotlin
Filed under Kotlin Collections
Learn a few ways to convert arrays to lists in Kotlin
Get the Name of the Currently Executing Function in Kotlin
Filed under Kotlin Concurrency
Learn few different approaches to get the name of the currently executing function
Convert Byte Arrays to Hex Strings in Kotlin
Filed under Kotlin Strings
Learn a couple of approaches to convert ByteArrays into hexadecimal strings in Kotlin
How Does String Interpolation Work in Kotlin?
Filed under Kotlin Strings
Learn how string interpolation in Kotlin works under-the-hood and take a look at possible future optimizations for the current implementation
Lambdas with Receivers in Kotlin
Filed under Kotlin Functions
Learn what lambdas with receivers are and how they result in more simplicity and readability
Difference Between Classes and Singleton Objects in Kotlin
Filed under Kotlin Classes and Objects
Learn how Kotlin classes and objects differ at both the language and bytecode levels.
Open Keyword in Kotlin
Filed under Kotlin Basics
Learn about inheritance rules and the open keyword in Kotlin
Varargs and Spread Operator in Kotlin
Filed under Kotlin Basics
Learn how to pass a variable number of arguments to functions in Kotlin
Type Aliases in Kotlin
Filed under Kotlin Basics
Learn about type aliases in Kotlin and their use cases
Initializing Empty Mutable Collections in Kotlin
Filed under Kotlin Collections
Learn how we can initialize mutable lists, maps, and sets with no elements
Static Initialization Block in Kotlin
Filed under Kotlin Classes and Objects
Learn how we can use companion objects to statically initialize a Kotlin class
Kotlin NullPointerException: Parameter specified as non-null is null
Filed under Kotlin Basics
Learn what happens when we store a null value into a non-null data type in Kotlin
Deprecation in Kotlin
Filed under Kotlin
Learn how Kotlin takes this simple deprecation idea from Java and takes it to a whole new level
Inline Functions in Kotlin
Filed under Kotlin Functions
Learn how to use inline functions in Kotlin
Operator Overloading in Kotlin
Filed under Kotlin Basics
Learn about the conventions that Kotlin provides for operator overloading