row-convert.wok

#!/usr/bin/wok -f

/** row-convert.wok
  * 
  * Usage:
  *   java -jar wok-0.1.0.jar -f row-convert.wok -v@rawstr expr=row.size input > output
  *
  * Option:
  *   -v@rawstr expr:  The scala code to be applied to all of the rows. `row` represents the value of a row and the type 
                       of which is `List[String]`. The type of the return value of this should be `List[Any]`.
  */

FS = '\t'
FQ = Quote.Min
OFS = '\t'
OFQ = Quote.All

import scala.reflect.runtime.currentMirror
import scala.tools.reflect.ToolBox

def source = s"""
new Function1[List[String], List[Any]] {
  def apply(row: List[String]): List[Any] = {
    ${expr}
  }
}
"""

val evaluator = {
  val toolbox = currentMirror.mkToolBox()
  val tree = toolbox.parse(source)
  toolbox.eval(tree).asInstanceOf[Function1[List[String], List[Any]]]
}

In { _
  .map (evaluator apply _)
  .foreach (row => println(row: _*))
}