scala

Exercises/ch3-ExpressionsAndConditionals.asciidoc

@@ -30,7 +30,7 @@ First, here's the if..else block (specifically an if..else-if..else block).
 scala> val amount = 2.143
 amount: Double = 2.143
 
-scala> if (amount > 0) "greater" else if (amount < 0) "lesser" else "same"
+scala> if (amount > 0) "greater" else if (amount < 0) "less" else "same"
 res0: String = greater
 -------------------------------------------------------------------------------
 
@@ -40,7 +40,7 @@ Second, the match expression that achieves the same purpose.
 -------------------------------------------------------------------------------
 scala> amount match {
      |   case x if x > 0 => "greater"
-     |   case x if x < 0 => "lesser"
+     |   case x if x < 0 => "less"
      |   case x => "same"
      | }
 res1: String = greater

Exercises/ch5-FirstClassFunctions.asciidoc

@@ -78,7 +78,7 @@ res3: Int = -1002398428
 scala> val t = (nextInt, nextInt, nextInt)
 t: (Int, Int, Int) = (913142586,1268532435,94040930)
 
-scala> pickOne(t, (x, y) => x)
+scala> pickOne(t, (x, y) => y)
 res4: Int = 913142586
 -------------------------------------------------------------------------------
 
@@ -139,6 +139,7 @@ Here's an example of invoking the original function with a specific type and sep
 
 [source,scala]
 -------------------------------------------------------------------------------
+scala> def fzero[A](x: A)(f: A ⇒ Unit): A = { f(x); x }
 scala> fzero[Boolean](false) { b => println(s"b was $b") }
 b was false
 res1: Boolean = false
@@ -175,7 +176,7 @@ Indeed, using a wildcard to assign a function would help make "sq" into a functi
 scala> val sq = square _
 sq: Double => Double = <function1>
 
-scala> sq1(4.0)
+scala> sq(4.0)
 res0: Double = 16.0
 
 scala> val sq: Double => Double = square

Exercises/ch6-CommonCollections.asciidoc

@@ -128,7 +128,7 @@ Again, let's start with a short and simple implementation that takes advantage o
 
 [source,scala]
 -------------------------------------------------------------------------------
-scala> def longest(l: List[String]): String = names.sortBy(0 - _.size).head
+scala> def longest(l: List[String]): String = l.sortBy(0 - _.size).head
 longest: (l: List[String])String
 
 scala> val names = List("Harry", "Hermione", "Ron", "Snape")

Exercises/ch7-MoreCollections.asciidoc

@@ -55,7 +55,7 @@ Here's a tail-recursive implementation, including the "tailrec" annotation so th
 [source,scala]
 -------------------------------------------------------------------------------
 scala> @annotation.tailrec
-     | def fibAdd(l: List[Int], count: Int): List[Int] = {
+     | def fibAdd2(l: List[Int], count: Int): List[Int] = {
      |   if (count < 1) l
      |   else {
      |     val k = l :+ l.takeRight(2).sum
@@ -759,7 +759,7 @@ Here's an example of reporting the commits for the scala, akka and scalaz projec
 
 [source]
 -------------------------------------------------------------------------------
-> ./GithubCommits.scala scala/scala/2.11.x akka/akka/master scalaz/scalaz/series%2f7.2.x
+> ./GithubCommits.scala scala/scala/2.12.x akka/akka/master scalaz/scalaz/series%2f7.2.x
 [info] Set current project to root-4b6293a0de6b4c2b38c4 (in build file:/Users/jason/.sbt/boot/4b6293a0de6b4c2b38c4/)
 Reporting for 3 repositories: (scala,scala,2.11.x) & (akka,akka,master) & (scalaz,scalaz,series%2f7.2.x)
 Github activity for scala, akka, scalaz repos

Exercises/ch9-ObjectsCaseClassesAndTraits.asciidoc

@@ -18,7 +18,7 @@ The new "HtmlUtils.scala" file should be located in "src/main/scala", the root d
 -------------------------------------------------------------------------------
 import org.scalatest._                                                      
 
-class HtmlUtilsSpec extends FlatSpec with ShouldMatchers {                  
+class HtmlUtilsSpec extends FlatSpec with Matchers {                  
 
   "The Html Utils object" should "remove single elements" in {              
     HtmlUtils.removeMarkup("<br/>") should equal("")                        
@@ -36,7 +36,7 @@ class HtmlUtilsSpec extends FlatSpec with ShouldMatchers {
 }
 -------------------------------------------------------------------------------
 
-We're only using the +FlatSpec+ and +ShouldMatchers+ types from this package, but will import everything so we can easily add additional test utilities in the future (such as "OptionValues", a favorite of mine). The class +FlatSpec+ is one of several different test types you can choose from, modeled after Ruby's *RSpec*. +ShouldMatchers+ adds the +should+ and +be+ operators to your test, creating a domain-specific language that can help make your tests more readable.
+We're only using the +FlatSpec+ and +Matchers+ types from this package, but will import everything so we can easily add additional test utilities in the future (such as "OptionValues", a favorite of mine). The class +FlatSpec+ is one of several different test types you can choose from, modeled after Ruby's *RSpec*. +Matchers+ adds the +should+ and +be+ operators to your test, creating a domain-specific language that can help make your tests more readable.
 
 The first test starts off a bit differently from the other tests. With the +FlatSpec+, the first test in a file should start with a textual description of what you are testing in this file. Later tests will use the +it+ keyword to refer to this description. This helps to create highly readable test reports.
 
@@ -83,7 +83,7 @@ Here is its test class with two new tests, one to verify that multi-line element
 -------------------------------------------------------------------------------
 import org.scalatest._
 
-class HtmlUtilsSpec extends FlatSpec with ShouldMatchers {
+class HtmlUtilsSpec extends FlatSpec with Matchers {
 
   "The Html Utils object" should "remove single elements" in {
     HtmlUtils.removeMarkup("<br/>") should equal("")
@@ -179,7 +179,7 @@ b) A good test should indicate a specific feature, whether functional or non-fun
 -------------------------------------------------------------------------------
 import org.scalatest._
 
-class SafeStringUtilsSpec extends FlatSpec with ShouldMatchers {
+class SafeStringUtilsSpec extends FlatSpec with Matchers {
 
   "The Safe String Utils object" should "trim empty strings to None" in {
     SafeStringUtils.trimToNone("") should be(None)
@@ -247,7 +247,7 @@ Here's the full test class including three new tests for the "parseToInt" functi
 -------------------------------------------------------------------------------
 import org.scalatest._
 
-class SafeStringUtilsSpec extends FlatSpec with ShouldMatchers {
+class SafeStringUtilsSpec extends FlatSpec with Matchers {
 
   "The Safe String Utils object" should "trim empty strings to None" in {
     SafeStringUtils.trimToNone("") should be(None)
@@ -347,7 +347,7 @@ Following is the final version of the test class with three new tests.
 -------------------------------------------------------------------------------
 import org.scalatest._
 
-class SafeStringUtilsSpec extends FlatSpec with ShouldMatchers {
+class SafeStringUtilsSpec extends FlatSpec with Matchers {
 
   "The Safe String Utils object" should "trim empty strings to None" in {
     SafeStringUtils.trimToNone("") should be(None)
@@ -504,7 +504,7 @@ Here's my test class, including a utility method to write the content to a new u
 import java.io.File
 import org.scalatest._
 
-class MultiReplacerSpec extends FlatSpec with ShouldMatchers {
+class MultiReplacerSpec extends FlatSpec with Matchers {
 
   import MultiReplacer._
 
@@ -661,7 +661,7 @@ import java.io.{PrintWriter, File}
 import org.scalatest._
 
 
-class FileSummySpec extends FlatSpec with ShouldMatchers {
+class FileSummySpec extends FlatSpec with Matchers {
 
   import FileSummy._
 
@@ -945,7 +945,7 @@ trait PrintlnTesting {
   }
 }
 
-class GHIssueReporterSpec extends FlatSpec with ShouldMatchers with PrintlnTesting {
+class GHIssueReporterSpec extends FlatSpec with Matchers with PrintlnTesting {
 
   import ch9.GHIssueReporter._
 
@@ -1032,7 +1032,7 @@ trait JSONSupport {
   implicit val formats = DefaultFormats
 
   def parseIssuesFromJson(json: String): List[GithubIssue] = {
-    val t = Try( JsonMethods.parse(json).extract[List[GithubIssue]] )
+    val t = scala.util.Try( JsonMethods.parse(json).extract[List[GithubIssue]] )
     t getOrElse Nil
   }
 

README.md

@@ -0,0 +1,17 @@
+
+# 러닝 스칼라  
+
+ ![러닝 스칼라](http://image.kyobobook.co.kr/images/book/large/791/l9791185890791.jpg)  
+
+**출판사** 제이펍  
+**원출판사** O’REILLY  
+**원서명** Learning Scala(원서 ISBN 9781449367930)  
+**저자명** 제이슨 스와츠  
+**역자명** 김정인, 강성용  
+**출판일** 2017년 4월 17일  
+**페이지** 292쪽  
+**ISBN** 979-11-85890-79-1 (93000)  
+
+[### 도서 소개 페이지 바로 가기 ###](http://jpub.tistory.com/677)  
+
+