Collection Filtering in Kotlin
Most often than not, when dealing with collections there’s a need for filtering them before displaying.
Tutorials
Calling Multiple Methods in Kotlin
Kotlin lets you call multiple methods on the same object.
Easy Singletons in Kotlin
Singleton pattern involves a single class which is responsible to create an object while making sure that only one single instance gets created.
Multiline String Literals in Kotlin
Multiline String Literals in Java have always been clumsy and full of + operators for line-breaks.
Named Arguments in Kotlin
Using named arguments you can make more expressive calls.
Group Initialisation in Kotlin
Group object initialisation in Kotlin promote cleaner and easier to read code.
Destructuring Declarations in Kotlin
A destructuring declaration creates multiple variables at once.
Local functions in Kotlin
Kotlin supports local functions, i.e. it allows you to put a function inside a function.
Tail recursive functions in Kotlin
Algorithms that would normally be written using loops are instead written as recursive functions with no risk of stack overflows.
Flattening Lists and Arrays in Kotlin
With the flatten method in Kotlin, you can turn a list of lists and array of arrays into a singl...
Checking for nulls in Kotlin
Kotlin’s type system is aimed to eliminate NullPointerException's from your code.
Vetoable properties in Kotlin
Vetoable are delegate properties that allow you to update a property value if a certain condition is matched.
Working With Ranges in Kotlin
Kotlin provides a simple and intuitive way to create ranges.
Functions are first-class citizens in Kotlin
Kotlin functions are first-class citizens, which means they can be stored in variables and data structures, passed as arguments to and returned from other...
Lazy initialisation in Kotlin
Just like Late Initialisation Non-null type properties must be initialised in the constructor but that’s not always very convenient. Concatenating strings with a + is a waste of time when you can use string templates.
In most programming languages you have to derive a new class. In Kotlin you can extend a class with new functionality.
Removing duplicates from arrays usually involves looping through an entire array and creating a new array without duplicates.
No need for explicitly defining generic types and no repetitive When a function returns a single expression, the curly braces can be omitted and the body is specified after a = symbol.
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Late initialisation in Kotlin
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String Templates in Kotlin
Extension functions in Kotlin
Remove array duplicates in Kotlin
Defining a map in Kotlin
put or assignment to define maps...
Functions With Expression Body