Hey there!
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In this post, we will look at a program to demonstrate the Repeated Parameters in Scala.
Repeated Parameters are useful when passing variable length argument list i.e., the function is capable of accepting any number of parameters. This parameter has to be the last one in the function parameter list while declaring the function.
Lets look at a simple program:
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package com.clearurdoubt object RepeatedParamsDemo { def repeatedParams(displayParams: Boolean, y: Int*) = { println(s"length of repeated params= ${y.length}") if(displayParams) { for(param <- y) print(param + " ") } } def main(args: Array[String]) { repeatedParams(false) repeatedParams(true, 1, 2, 3, 10) } } |
Output:
If we would like to pass the elements of a List/Array to the function, we can update the code as below:
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def main(args: Array[String]) { val list = List(1, 2, 3, 10) // To pass the elements of the List to the function, use "list : _*" as the parameter to it repeatedParams(true, list: _*) } |
Output:
Happy Learning :).
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