What is Partialfunction Scala?
A partial function is a function applicable to a subset of the data it has been defined for. For example, we could define a function on the Int domain that only works on odd numbers.
How do you create a partial function in Scala?
There are some methods to define Partial function, which includes case statements, collect method, andThen, and orElse.
- Partial function using Case statement:
- Partial function using orElse:
- Partial function using Collect method:
- Partial function using andThen:
How do you write a higher order function in Scala?
Scala Higher Order Functions
- object MainObject {
- def main(args: Array[String]) = {
- functionExample(25, multiplyBy2) // Passing a function as parameter.
- }
- def functionExample(a:Int, f:Int=>AnyVal):Unit = {
- println(f(a)) // Calling that function.
- }
- def multiplyBy2(a:Int):Int = {
What is lambda function in Scala?
Scala lambda functions are anonymous functions. They reduce the line of code and make the function more readable and convenient to define. We can also reuse them. We can use this lambda function to iterate our collection data structure and performed any kind of operation on them.
What does underscore mean in scala?
Scala allows the use of underscores (denoted as ‘_’) to be used as placeholders for one or more parameters. we can consider the underscore to something that needs to be filled in with a value. However, each parameter must appear only one time within the function literal.
What is anonymous function in scala?
In Scala, An anonymous function is also known as a function literal. A function which does not contain a name is known as an anonymous function. An anonymous function provides a lightweight function definition. It is useful when we want to create an inline function.
What is anonymous function in Scala?
What is a closure in Scala?
Scala Closures are functions which uses one or more free variables and the return value of this function is dependent of these variable. The free variables are defined outside of the Closure Function and is not included as a parameter of this function.
What is high order function Scala?
A higher-order function (HOF) is often defined as a function that (a) takes other functions as input parameters or (b) returns a function as a result. In Scala, HOFs are possible because functions are first-class values.
What is Monad in Scala?
In Scala, Monads is a construction which performs successive calculations. It is an object which covers the other object. It is worth noting that here, the output of an operation at some step is an input to another computations, which is a parent to the recent step of the program stated.