How to dynamic assign special field from method parameter when extract method to perform query

[Mike Chen]

Hi, I have a problem when I want to extract duplicate logic to a method:

this is my origin code that to perform a statistic to update the most common value from a table field :

val goods = getFromDb(goodsid)

//for cost field
from(yhGoodsShops)(gs =>
    where(gs.venderid === venderid and gs.goodsid === goods.goodsid)
            groupBy (gs.cost)
            compute (count())
            orderBy (count() desc)
).page(0, 1).toList.headOption.foreach(row => {
    if (goods.cost != row.key) {        
        goods.cost = row.key        
    }
})

//for price field
from(yhGoodsShops)(gs =>
    where(gs.venderid === venderid and gs.goodsid === goods.goodsid)
            groupBy (gs.price)
            compute (count())
            orderBy (count() desc)
).page(0, 1).toList.headOption.foreach(row => {
    if (goods.price != row.key) {        
        goods.price = row.key        
    }
})

I want to extract a method  to do the same job like this::

goods.cost = newMethod("cost", goods.cost)
goods.price = newMethod("price", goods.price)

how I to define the newMethod ?

Thanks.