Scala Map exists() method with example

The exists() method is utilized to check if the given predicate satisfy the elements of the map or not.

Method Definition: def exists(p: ((A, B)) => Boolean): Boolean

Return Type: It returns true if the stated predicate holds true for some elements of the map else it returns false.



Example #1:

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// Scala program of exists()
// method
  
// Creating object
object GfG
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating map
        val m1 = Map("geeks" -> 5, "for" -> 3)
          
        // Applying exists method
        val result = m1.exists(x => x._1 == "for" && x._2 == 3)
          
        // Displays output
        println(result)
      
    }
}

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Output:

true

So, here the stated predicate is true for the second key-value pair so true is returned.
Example #2:

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// Scala program of exists()
// method
  
// Creating object
object GfG
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating map
        val m1 = Map("geeks" -> 5, "for" -> 3)
          
        // Applying exists method
        val result = m1.exists(x => x._1 == "geeks" && x._2 == 3)
          
        // Displays output
        println(result)
      
    }
}

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Output:

false


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