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<?xml version="1.0" encoding="UTF-8"?> | |
<project version="4"> | |
<component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK"> | |
<output url="file://$PROJECT_DIR$/out" /> | |
</component> | |
</project> |
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<?xml version="1.0" encoding="UTF-8"?> | |
<project version="4"> | |
<component name="ProjectModuleManager"> | |
<modules> | |
<module fileurl="file://$PROJECT_DIR$/DesignWeek1.iml" filepath="$PROJECT_DIR$/DesignWeek1.iml" /> | |
</modules> | |
</component> | |
</project> |
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<?xml version="1.0" encoding="UTF-8"?> | |
<module type="JAVA_MODULE" version="4"> | |
<component name="NewModuleRootManager" inherit-compiler-output="true"> | |
<exclude-output /> | |
<content url="file://$MODULE_DIR$"> | |
<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" /> | |
</content> | |
<orderEntry type="inheritedJdk" /> | |
<orderEntry type="sourceFolder" forTests="false" /> | |
<orderEntry type="library" name="scala-sdk-2.11.8" level="application" /> | |
</component> | |
</module> |
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case class Book(title: String, authors: List[String]) | |
val books: List[Book] = List( | |
Book(title = "Structure and Interpretation of Computer Programs", | |
authors = List("Abelson, Harald", "Sussman, Gerald J.")), | |
Book(title = "Introduction to Functional Programming", | |
authors = List("Bird, Richard", "Wadler, Phil")), | |
Book(title = "Effective Java", | |
authors = List("Bloch, Joshua")), | |
Book(title = "Java Puzzlers", | |
authors = List("Bloch, Joshua", "Gafter, Neal")), | |
Book(title = "Programming in Scala", | |
authors = List("Odersky, Martin", "Spoon, Lex", "Venners, Bill"))) | |
for (b <- books; a <- b.authors if a startsWith "Bird,") | |
yield b.title | |
for (b <- books if b.title.indexOf("Program") >= 0) | |
yield b.title | |
for (b <- books if (b.title indexOf "Program") >= 0) | |
yield b.title | |
{ for { | |
b1 <- books | |
b2 <- books | |
if b1 != b2 | |
a1 <- b1.authors | |
a2 <- b2.authors | |
if a1 == a2 | |
} yield a1 }.distinct | |
val bookSet = books.toSet | |
for { | |
b1 <- bookSet | |
b2 <- bookSet | |
if b1 != b2 | |
a1 <- b1.authors | |
a2 <- b2.authors | |
if a1 == a2 | |
} yield a1 |
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