package kernel.function;
  
  import kernel.Cell;

  import kernel.LanguageEnum;

  import java.util.List;

  import java.util.OptionalDouble;

  
  public class Average extends Function {
  

      private static final long serialVersionUID = 1L;

      public Average(List<Cell> listCells) {

          super(listCells);
          this.names.put(LanguageEnum.FR, "MOYENNE");
          this.names.put(LanguageEnum.EN, "AVERAGE");

      }
  

      public double eval() {

          OptionalDouble average = this.listCells.stream()
                  .mapToDouble(Cell::getValue)
                  .average();
  
          return average.isPresent() ? average.getAsDouble() : 0.;
      }
  }