Beginning Scala 2nd Edition

相似文件 换一批

是 否 +2 论坛币

k人 参与回答

经管之家送您一份

应届毕业生专属福利!

求职就业群

赵安豆老师微信：zhaoandou666

经管之家联合CDA

送您一个全额奖学金名额~ !

立即领取

感谢您参与论坛问题回答

经管之家送您两个论坛币！

+2 论坛币

1. Author:David Pollak, Vishal Layka
   
2. Isbn:978-1-4842-0233-3, 978-1-4842-0232-6, 1484202333
   
3. Year:2015
   
4. Pages:246
   
5. Language:English
   
6. File size:3.8 MB
   
7. File format:PDF
   
8. Category:Scala
   
9. Book Description:
   
10. 
    
11. Beginning Scala, Second Edition takes a down-to-earth approach to teaching Scala that leads you through simple examples that can be combined to build complex, scalable systems and applications.
    
12. 
    
13. This book introduces you to the Scala programming language, its object-oriented and functional programming characteristics, and then guides you through Scala constructs and libraries that allow you to assemble small components into high-performance, scalable systems. You will learn why Scala is judiciously used for critical business applications by leading companies such as Twitter, LinkedIn, Foursquare, the Guardian, Morgan Stanley, Credit Suisse, UBS, and HSBC.
    
14. 
    
15. Scala is a multi-paradigm programming language that combines both functional and object-oriented features. Moreover, this highly scalable language lends itself well to building cloud-based/deliverable Software as a Service (SaaS) online applications.

复制代码

本帖隐藏的内容

第二版Beginning Scala.pdf (3.77 MB, 需要: 29 个论坛币)

2015-4-20 02:12:41 上传

scala
需要: 29 个论坛币  [购买]

扫码加我 拉你入群

请注明：姓名-公司-职位

以便审核进群资格，未注明则拒绝

分享1 收藏13 回帖

关键词：Beginning Edition dition beginn editio beginning

1. Listing 3-1. Concrete shapes
   
2. class Rectangle(val width:Double,val height:Double) extends Shape {
   
3. override def area:Double = width*height
   
4. }
   
5. class Circle(val radius:Double) extends Shape {
   
6. override def area:Double = math.Pi*radius*radius
   
7. }

复制代码

1. Listing 3-2. Parameter with val
   
2. class Book(private val title: String) {
   
3. def printTitle(b: Book) {
   
4. println(b.title)
   
5. }
   
6. }
   
7. scala> val book = new Book("Beginning Scala")
   
8. book: Book = Book@ea05be
   
9. scala> book.printTitle(new Book("Beginning Erlang"))
   
10. Beginning Erlang

复制代码

1. Listing 3-3. Parameter without val/var
   
2. class Book(title: String) {
   
3. def printTitle(b: Book) {
   
4. println(b.title)
   
5. }
   
6. }

复制代码

1. Listing 3-4. Auxiliary constructor
   
2. class Book (var title :String, var ISBN: Int) {
   
3. def this(title: String) {
   
4. this(title, 2222)
   
5. }
   
6. def this() {
   
7. this("Beginning Erlang")
   
8. this.ISBN = 1111
   
9. }
   
10. override def toString = s"$title ISBN- $ISBN"
    
11. }
    
12. Given these constructors, the same Book can be created in the following ways:
    
13. val book1 = new Book
    
14. val book2 = new Book("Beginning Clojure")
    
15. val book3 = new Book("Beginning Scala", 3333)
    
16. scala> val book1 = new Book
    
17. book1: Book = Beginning Erlang ISBN- 1111
    
18. scala> val book2 = new Book("Beginning Clojure")
    
19. book2: Book = Beginning Clojure ISBN- 2222
    
20. scala> val book3 = new Book("Beginning Scala", 3333)
    
21. book3: Book = Beginning Scala ISBN- 3333

复制代码

1. Listing 3-5. Methods can reference any variables in their scope
   
2. def readLines(br: BufferedReader) = {
   
3. var ret: List[String] = Nil
   
4. defreadAll():Unit= br.readLinematch {
   
5. case null =>
   
6. case s => ret ::= s ; readAll()
   
7. }
   
8. readAll()
   
9. ret.reverse
   
10. }

复制代码

1. Listing 3-6. An abstract method without override
   
2. abstractclassBase {
   
3. defthing: String
   
4. }
   
5. classOneextends Base {
   
6. defthing= "Moof"
   
7. }

复制代码

1. Listing 3-7. Using override
   
2. classTwoextends One{
   
3. overridevalthing= (new java.util.Date).toString
   
4. }
   
5. classThree extends One{
   
6. overridelazy valthing= super.thing + (newjava.util.Date).toString
   
7. }

复制代码

1. Listing 3-8. The result of a codeblock
   
2. def meth3():String = {"Moof"}
   
3. def meth4():String = {
   
4. val d = new java.util.Date()
   
5. d.toString()
   
6. }

复制代码

1. Listing 3-9. variable definition code block
   
2. val x3:String= {
   
3. val d = new java.util.Date()
   
4. d.toString()
   
5. }

复制代码