引数を指定している関数は()を省略することができない | Codetter（こーどったー）

1
2
3
4
5
6
7
8
9
10
11
scala> def now(time:java.util.Date = new java.util.Date) = time.toString
now: (time: java.util.Date)java.lang.String
scala> now
<console>:7: error: missing arguments for method now in object $iw;
follow this method with `_' if you want to treat it as a partially applied function
       now
       ^
scala> now()
res17: java.lang.String = Wed Jul 20 05:50:25 JST 2011
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX