如何将参数传递给scala中的方法

Question

I am trying to pass the fourth (targetFileCount) argument to a method as below

val config = ConfigFactory.load("market_opt_partition.properties")
val targetFileCount = (config.getInt(Code))
writeArray1.par.foreach {
  case (df, path, tog, targetFileCount) => Utility.write(df, path, tog, targetFileCount)
}
object Utility {
    def write(sourceDf: DataFrame, path: String, toggle: String, targetFileCount:Int): Unit

But I am facing the below error,

Error:(368, 12) constructor cannot be instantiated to expected type;
found   : (T1, T2, T3, T4)
required: (org.apache.spark.sql.DataFrame, String, String)
      case (df, path, tog, targetFileCount) => Utility.write(df, path, tog, targetFileCount)

Error:(368, 67) not found: value df
      case (df, path, tog, targetFileCount) => Utility.write(df, path, tog, targetFileCount)

Please let me know on how to rectify the same.

Answer 1

writeArray1 contains tuple 3 of org.apache.spark.sql.DataFrame, String, String So pattern matching on 4 params cannot work.

Another example:

val l = List(5)
l.map { case (a, b) => a.toString }

Also yields same error:

 error: constructor cannot be instantiated to expected type;
 found   : (T1, T2)
 required: Int

Answer 2

As said above writeArray1.par contains tuple of 3 org.apache.spark.sql.DataFrame, String, String So pattern matching on 4 params cannot work.

Please use as below.

val config = ConfigFactory.load("market_opt_partition.properties")
val targetFileCount = (config.getInt(Code))
writeArray1.par.foreach {
  case (df, path, tog) => Utility.write(df, path, tog, targetFileCount)
}
object Utility {
    def write(sourceDf: DataFrame, path: String, toggle: String, targetFileCount:Int): Unit