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SortedMap filter() Method in Scala

By IncludeHelp Last updated : November 14, 2024

Map is a collection that stores its elements as key-value pairs, like a dictionary. SortedMap is a special type of map in which elements are sorted in ascending order.

SortedMap filter() Method

SortedMap filter() method is used to select all the elements from SortedMap based on the given condition. The method returns a sortedMap which consists of elements that satisfies the given condition.

Syntax

SortedMap_Name.filter(condition)

Parameters

It is the condition used to filter elements.

Return Type

It returns a SortedMap which contains all elements that satisfy the given condition.

Example 1

When one or more elements of the SortedMap satisfy the filter condition

// Program to illustrate the working of filter method in Scala

import scala.collection.SortedMap

object myObject {
    def main(args: Array[String]): Unit = {
        val mySortedMap = SortedMap("scala" -> 5, "python" -> 2, "C/C++" -> 1, "JavaScript" -> 6, "Ruby" -> 8) 
        println("The Sorted Map is " + mySortedMap)  
        
        val filteredMap = mySortedMap.filter(ele => ele._2 > 3) 
        println(filteredMap)
    }
}

Output

The Sorted Map is TreeMap(C/C++ -> 1, JavaScript -> 6, Ruby -> 8, python -> 2, scala -> 5)
TreeMap(JavaScript -> 6, Ruby -> 8, scala -> 5)

Example 2

When no elements of the SortedMap satisfy the filter condition

// Program to illustrate the working of filter() method in scala

import scala.collection.SortedMap

object myObject {
    def main(args: Array[String]): Unit = {
        val mySortedMap = SortedMap("scala" -> 5, "python" -> 2, "C/C++" -> 1, "JavaScript" -> 6, "Ruby" -> 8) 
        println("The Sorted Map is " + mySortedMap)  
        
        val filteredMap = mySortedMap.filter(ele => ele._2 == 3) 
        println(filteredMap)
    }
}

Output

The Sorted Map is TreeMap(C/C++ -> 1, JavaScript -> 6, Ruby -> 8, python -> 2, scala -> 5)
TreeMap()