What is Koin? A pragmatic lightweight dependency injection framework for Kotlin developers Written in pure Kotlin. What is dependency and dependency Injection? Let’s take an example. We have a relation between Car and Engine classes. To access Engine...
An interface with only one abstract method is called a functional interface(Single Abstract Method). functional (SAM) interface can have multiple non abstract method but only one abstract method // functional interface example interface CatchAble {...
Coroutines provides combine, zip and flattenMerge operators is used to combine emissions from multiple flows Combine Combine operator takes the latest emission from two flows and gives result import kotlinx.coroutines.* import kotlinx.coroutines.f...
type alias provide alternative name for existing type. if type name is longer can be introduces shorter name , it will not introduced new types, they are equivalent to corresponding types. data class User( val name:String? = null, ) // alias fo...
The main purpose of data class is hold data , in koltin compiler automatically creates following getters and setters for the constructor parameters - hashCode() equals() toString() copy() componentN() function following condition should be fullf...
Filtering conditions are defined by predicate and lambda function takes collection element . it return true when given element matches to predicate , return false if doesn't matches. Filter by predicate use filter() to filtering. it returns collec...
1. lazy property - it used to create an object that is initialized only first access to the property value and store value and return it. By default lazy is synchronized the value is computed only in one thread ,and value will be same in all thread ...
Delegate is just class ,that help us to seperate all logic of getter and setters so it can be reused . if want to use same code for more than one property ,then don't need to apply same code for every property ex: /* dont need to write this code */...
kotlin support delegation pattern using by keyword. it allows the derived class to access all the implemented public methods of an interface through a specific object. interface Base { fun print() } class BaseImpl(val x:String):Base{ overrid...