Add all the A tasks

Task/Apply-a-callback-to-an-array/Scala/apply-a-callback-to-an-array-1.scala

@@ -0,0 +1,2 @@
+val l = List(1,2,3,4)
+l.foreach {i => println(i)}

Task/Apply-a-callback-to-an-array/Scala/apply-a-callback-to-an-array-2.scala

@@ -0,0 +1 @@
+l.foreach(println(_))

Task/Apply-a-callback-to-an-array/Scala/apply-a-callback-to-an-array-3.scala

@@ -0,0 +1,3 @@
+val a = Array(1,2,3,4)
+a.foreach {i => println(i)}
+a.foreach(println(_))  '' // same as previous line''

Task/Apply-a-callback-to-an-array/Scala/apply-a-callback-to-an-array-4.scala

@@ -0,0 +1,2 @@
+def doSomething(in: int) = {println("Doing something with "+in)}
+l.foreach(doSomething)

Task/Apply-a-callback-to-an-array/Scala/apply-a-callback-to-an-array-5.scala

@@ -0,0 +1 @@
+for(val i <- a) println(i)

Task/Apply-a-callback-to-an-array/Scala/apply-a-callback-to-an-array-6.scala

@@ -0,0 +1 @@
+val squares = l.map{i => i * i} ''//squares is''  List(1,4,9,16)

Task/Apply-a-callback-to-an-array/Scala/apply-a-callback-to-an-array-7.scala

@@ -0,0 +1 @@
+val squares = for (val i <- l) yield i * i