The filter() method is utilized to select all elements of the list which satisfies a stated predicate.
Method Definition: def filter(p: (A) => Boolean): List[A]
Return Type: It returns a new list consisting all the elements of the list which satisfies the given predicate.
Example #1:
// Scala program of filter() // method // Creating object object GfG
{ // Main method
def main(args : Array[String])
{
// Creating a list
val m 1 = List( 5 , 12 , 3 , 13 )
// Applying filter method
val result = m 1 .filter( _ < 10 )
// Displays output
println(result)
}
} |
Output:
List(5, 3)
Example #2:
// Scala program of filter() // method // Creating object object GfG
{ // Main method
def main(args : Array[String])
{
// Creating a list
val m 1 = List( 5 , 12 , 3 , 13 )
// Applying filter method
val result = m 1 .filter( _ < 3 )
// Displays output
println(result)
}
} |
Output:
List()
Here, an empty list is returned as none of the elements satisfy the stated predicate.