如何遍历Class类型的列表以在Groovy中编辑其对象的属性

Question

I know there are more elaborate ways to achieve this in Java, but Groovy should have a concise way to do the same as per http://groovy.codehaus.org/Looping

Class Currency.groovy

class Currency {
    String name
    double rate
}

CurrencyController

def select(){
    List<Currency> selectedCurrencies = Currency.getAll(params.currencies)
    selectedCurrencies.eachWithIndex { obj, i -> obj.rate = update(obj.name)};
    [selectedCurrencies:selectedCurrencies]
}

def update(String sym){
    return sym
}

The above code throws:

No signature of method: currencychecker.CurrencyController$_$tt__select_closure12.doCall() is applicable for argument types: (currencychecker.Currency)

Answer 1

Thanks to @dmahapatro, the issue was that I was using an iterator variable obj[i] , even though obj itself is the iterated object. The rest is correct! I experimented with selectCurrencies.each as well instead of selectCurrencies.eachWithIndex however the right one in this case is eachWithIndex