Présenter Scala

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Java	Scala
```java Map myMap = ... // cas 1 B myB = myMap.get(a); if (myB != null) { doStuff(myB); } ``` ```java // cas 2 B myB = myMap.get(a); if (myB != null) { doStuff(myB); } else { doStuff2(); } ``` ```java // cas 3 B myB = myMap.get(a); C myC = (myB != null) ? doStuff(myB) : doStuff2(); ```	```scala val myMap = ... // cas 1.1 myMap.get(a).foreach(myB => doStuff(myB)) // cas 1.2 myMap.get(a).foreach(doStuff) ``` ```scala // cas 2.1 (si default de myMap est "null") myMap(a) match { case null => doStuff2() case myB => doStuff(myB) } // cas 2.2 myMap.get(a) match { case Some(myB) => doStuff(myB) case None => doStuff2() } ```scala // cas 3.1 val myC = myMap.get(a) match { case Some(myB) => doStuff(myB) case None => doStuff2() } // cas 3.2 val myC = myMap.get(a).map(doStuff).getOrElse(doStuff2()) `</td> </tr>`