Why can't I directly assign to object properties using multiple return values from a method?

Question

Based on this question I've coded the following which throws a compilation time error:

Here is the code:

43. Currency currency = new Currency()
44. (currency.rate_one, currency.time_one) = getDateAndRate()

My method with two return values:

def getDateAndRate(){
    Date date = new Date()
    double rate = getRate();
    return [rate, date]
}

Error thrown

expecting '}', found ',' @ line 44, column 26.
(currency.rate_one, currency.time_one) = getDateAndRate()
                  ^

Dónal · Accepted Answer · 2014-07-24T09:37:34.183

2

Try this instead

def (rate, time) = getDateAndRate()
currency.rate_one = rate
currency.time_one = time

edited Jul 24 '14 at 09:37

answered Jul 24 '14 at 09:07

Dónal

It works! but why on earth it doesn't work like above? So annoying – Saba Ahang Jul 24 '14 at 09:20
1

if you want to make this code less verbose you could change `getDateAndRate` to accept a `Currency` argument, update it within the method, and return it – Dónal Jul 24 '14 at 09:39

score 0 · Answer 2 · answered Jul 25 '14 at 11:20

0

There is a trick I learned only recently myself and that is to combine multiple assignment and with:

with (currency) {
    (rate_one, time_one) = getDateAndTime()
}

answered Jul 25 '14 at 11:20

blackdrag

2 Answers2