package kernel.function;
  
  import kernel.Cell;

  import kernel.LanguageEnum;

  import java.util.List;

  import java.util.OptionalDouble;

  
  public class Average extends Function {

  	
  	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.;
  	}

  }