diff options
Diffstat (limited to 'scala.html.markdown')
| -rw-r--r-- | scala.html.markdown | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/scala.html.markdown b/scala.html.markdown index c8932c86..6964b9a0 100644 --- a/scala.html.markdown +++ b/scala.html.markdown @@ -100,7 +100,7 @@ true == false // false "Scala strings are surrounded by double quotes" 'a' // A Scala Char -'Single quote strings don't exist' // Error +// 'Single quote strings don't exist' <= This causes an error // Strings have the usual Java methods defined on them "hello world".length @@ -204,6 +204,7 @@ def showNumbersInRange(a:Int, b:Int):Unit = { if (a < b) showNumbersInRange(a + 1, b) } +showNumbersInRange(1,14) // Conditionals @@ -218,9 +219,6 @@ if (x == 11) println ("yeah") else println("nay") println(if (x == 10) "yeah" else "nope") val text = if (x == 10) "yeah" else "nope" -var i = 0 -while (i < 10) { println("i " + i); i+=1 } - ################################################# ## 4. Data Structures @@ -292,7 +290,8 @@ d._2 And now we will explain what these are. */ -class Dog { +class Dog(br: String) { + var breed: String = br //A method called bark, returning a String def bark: String = { // the body of the method @@ -300,6 +299,11 @@ class Dog { } } +val mydog = new Dog("greyhound") +println(mydog.breed) // => "greyhound" +println(mydog.bark) // => "Woof, woof!" + + // Classes can contain nearly any other construct, including other classes, // functions, methods, objects, case classes, traits etc. @@ -388,6 +392,7 @@ sSquared.reduce (_+_) // The filter function takes a predicate (a function from A -> Boolean) and // selects all elements which satisfy the predicate List(1, 2, 3) filter (_ > 2) // List(3) +case class Person(name:String, phoneNumber:String) List( Person(name = "Dom", age = 23), Person(name = "Bob", age = 30) @@ -396,6 +401,7 @@ List( // Scala a foreach method defined on certain collections that takes a type // returning Unit (a void method) +val aListOfNumbers = List(1, 2, 3, 4, 10, 20, 100) aListOfNumbers foreach (x => println(x)) aListOfNumbers foreach println |