Scalaをはじめる α

LT駆動開発15 - 水光紫陽花
https://github.com/LTDD/Sessions/wiki/LT%E9%A7%86%E5%8B%95%E9%96%8B%E7%99%BA15

解説
http://blog.eiel.info/blog/2015/06/06/ltdd-2015-06-scala/

Transcript

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11. ΘΜΒ͍ͳʔɻ $ scala -e 'println(“Hello, Z”)' Hello, Z
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13. ϑΝΠϧʹॻ͘ɻ $ cat hello_world.scala println(“Hello, Z”) $ scala hello_world.scala Hello, Z
14. ͜Μͺ͍Δͯ͠ɻ $ cat HelloCompile.scala object HelloCompile { def main(args: Array[String]) = println(“Hello, Z”) } $ scalac HelloCompile.scala $ scala HelloCompile Hello, Z
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23. TDBMB[Λ͔ͭͬͯΈΔɻ $ scala -version Scala code runner version 2.11.6 -- Copyright 2002-2013, LAMP/EPFL $ curl -O https://repo1.maven.org/maven2/org/scalaz/ scalaz-core_2.11/7.1.2/scalaz-core_2.11-7.1.2.jar $ scala -cp scalaz-core_2.11-7.1.2.jar > import scalaz.Scalaz._ val hello = (str: String) => "Hello, " + str val z = (str: Option[String]) => str.getOrElse("Z") (hello <<< z)(None) // => "Hello, Z” (hello <<< z)(Some(“World”)) // => “Hello, World”
24. ͜Μͺ͍Δͯ͠ΈΔɻ $ cat HelloZ.scala import scalaz.Scalaz._ class Hello extends App { val hello = (str: String) => "Hello, " + str val z = (str: Option[String]) => str.getOrElse("Z") println((hello <<< z)(args.headOption)) } $ scalac -cp scalaz-core_2.11-7.1.2.jar HelloZ.scala $ scala -cp scalaz-core_2.11-7.1.2.jar:. HelloZ Hello, Z $ scala -cp scalaz-core_2.11-7.1.2.jar:. HelloZ World Hello, World
25. ͜Μͺ͍Δͯ͠ΈΔɻ $ cat HelloZ.scala import scalaz.Scalaz._ class Hello extends App { val hello = (str: String) => "Hello, " + str val z = (str: Option[String]) => str.getOrElse("Z") println((hello <<< z)(args.headOption)) } $ scalac -cp scalaz-core_2.11-7.1.2.jar HelloZ.scala $ scala -cp scalaz-core_2.11-7.1.2.jar:. HelloZ Hello, Z $ scala -cp scalaz-core_2.11-7.1.2.jar:. HelloZ World Hello, World
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