Scala Collections Tutorial
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Scala Collections - dropWhile
Scala Collections - DropWhile Method
dropWhile() method is method used by List to drop all elements which satisfies a given condition.
Syntax
The following is the syntax of dropWhile method.
def dropWhile(p: (A) => Boolean): List[A]
Here, p: (A) => Boolean is a predicate or condition to be appped on each element of the pst. This method returns the all the elements of pst except dropped ones.
Usage
Below is an example program of showing how to use dropWhile method −
Example
object Demo {
def main(args: Array[String]) = {
val pst = List(3, 6, 9, 4, 2)
// print pst
println(pst)
//apply operation
val result = pst.dropWhile(x=>{x % 3 == 0})
//print result
println(result)
}
}
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, 9, 4, 2) List(4, 2)Advertisements