Scala：Method 小技巧，忽略result type之后的等号

 1 var x = 0
 2 
 3 def IncreaseOne(): Int = {
 4   x += 1
 5   x
 6 }
 7 
 8 def IncreaseOne() = {
 9   x += 1
10   x
11 }
12 
13 def IncreaseOne = {
14   x += 1
15   x
16 }
17 
18 
19 def IncreaseOne(): Unit = {
20   x += 1
21   x
22 }
23 
24 def IncreaseOne() {
25   x += 1
26   x
27 }
28 
29 
30 def IncreaseOne = {
31   x += 1
32   x
33 }