第19章：Scalaでカリー化と部分適用 ref: http://qiita.com/f81@github/items/e8bfab96b4be9e404840

file0.scala

scala> val add = {(x:Int, y:Int, z:Int) => x + y + z}
add: (Int, Int, Int) => Int = <function3>

file1.txt

[関数名]: (引数) => (戻り値) <functionトレイト>

file10.scala

scala> val addPartialWithX = addPartial(_:Int, _:Int, 5)
addPartialWithX: (Int, Int) => Int = <function2>

file11.scala

scala> addPartialWithX(2, 3)
res3: Int = 10

file12.scala

scala> val addPartialNone = addPartial _
addPartialNone: (Int, Int, Int) => Int = <function3>

file2.scala

scala> val addCurried = add.curried
addCurried: Int => (Int => (Int => Int)) = <function1>

file3.scala

scala> val addCurriedWithX = addCurried(1)
addCurriedWithX: Int => (Int => Int) = <function1>

file4.scala

scala> val addCurriedWithXY = addCurriedWithX(2)
addCurriedWithXY: Int => Int = <function1>

file5.scala

scala> addCurriedWithXY(3)
res2: Int = 6

file6.scala

scala> addCurried(1)(2)(3)
res1: Int = 6

file7.scala

scala> def addScalaCurried(x:Int)(y:Int)(z:Int) = x + y + z
addScalaCurried: (x: Int)(y: Int)(z: Int)Int

file8.scala

scala> val addScalaCurriedFunc = addScalaCurried _
addScalaCurriedFunc: Int => (Int => (Int => Int)) = <function1>

file9.scala

scala> def addPartial(x:Int, y:Int, z:Int) = x + y + z
addPartial: (x: Int, y: Int, z: Int)Int