- Scala Collections Tutorial
- Scala Collections - Home
- Scala Collections - Overview
- Scala Collections - Environment Setup
- Scala Collections - Arrays
- Scala Collections - Array
- Scala Collections - Multi-Dimensional Array
- Scala Collections - Array using Range
- Scala Collections - ArrayBuffer
- Scala Collections - Lists
- Scala Collections - List
- Scala Collections - ListBuffer
- Scala Collections - ListSet
- Scala Collections - Vector
- Scala Collections - Sets
- Scala Collections - Set
- Scala Collections - BitSet
- Scala Collections - HashSet
- Scala Collections - TreeSet
- Scala Collections - Maps
- Scala Collections - Map
- Scala Collections - HashMap
- Scala Collections - ListMap
- Scala Collections - Miscellaneous
- Scala Collections - Iterator
- Scala Collections - Option
- Scala Collections - Queue
- Scala Collections - Tuple
- Scala Collections - Seq
- Scala Collections - Stack
- Scala Collections - Stream
- Scala Collections Combinator methods
- Scala Collections - drop
- Scala Collections - dropWhile
- Scala Collections - filter
- Scala Collections - find
- Scala Collections - flatMap
- Scala Collections - flatten
- Scala Collections - fold
- Scala Collections - foldLeft
- Scala Collections - foldRight
- Scala Collections - map
- Scala Collections - partition
- Scala Collections - reduce
- Scala Collections - scan
- Scala Collections - zip
- Scala Collections Useful Resources
- Scala Collections - Quick Guide
- Scala Collections - Useful Resources
- Scala Collections - Discussion
Scala Collections - FoldRight Method
foldRight() method is a member of TraversableOnce trait, it is used to collapse elements of collections. It navigates elements from Right to Left order.
Syntax
The following is the syntax of foldRight method.
def foldRight[B](z: B)(op: (B, A) ? B): B
Here, fold method takes associative binary operator function as a parameter. This method returns the resulted value.
Usage
Below is an example program of showing how to use foldRight method −
Example
object Demo {
def main(args: Array[String]) = {
val list = List(1, 2, 3 ,4)
//apply operation to get sum of all elements of the list
val result = list.foldRight(0)(_ + _)
//print result
println(result)
}
}
Here we've passed 0 as initial value to foldRight function and then all values are added. Save the above program in Demo.scala. The following commands are used to compile and execute this program.
Command
\>scalac Demo.scala \>scala Demo
Output
10
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