partition() method is a member of TraversableLike trait, it is used to run a predicate method on each elements of a collection. It returns two collections, one collection is of elements which satisfiles a given predicate function and another collection is of elements which do not satisfy the given predicate function.
Syntax
The following is the syntax of map method.
def partition(p: (A) ? Boolean): (Repr, Repr)
Here, partition method takes a prediate function as a parameter. This method returns the collections.
Usage
Below is an example program of showing how to use partition method −
Example
object Demo { def main(args: Array[String]) = { val list = List(1, 2, 3, 4, 5, 6, 7) //apply operation to get twice of each element. val (result1, result2) = list.partition(x=>{x % 3 == 0}) //print result println(result1) println(result2) } }
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
List(3, 6) List(1, 2, 4, 5, 7)