notyy

import System.IO
import Data.String
import Data.Map(Map,empty,insertWith',toList)
import Data.List(foldl',sortBy)
import Data.Ord(comparing)


main = do
        inh <- openFile "sample.txt" ReadMode
        inpStr <- hGetContents inh

notyy

val timeSections = List((0,3), (3,6), (6,9), (9,12), (12,15), (15,18), (18,21), (21,24))

scala> val hour = Calendar.getInstance.get(Calendar.HOUR_OF_DAY)
hour: Int = 12

//doesn't work
scala> timeSections.filter((start,end) => start <= hour && end > hour)
<console>:11: error: wrong number of parameters; expected = 1
              timeSections.filter((start,end) => start <= hour && end > hour)

notyy

scala> def gen[T](count:Int, elem:T): List[T] = List.fill(count)(elem)
gen: [T](count: Int, elem: T)List[T]

scala> gen[Char](4, 'a')
res21: List[Char] = List(a, a, a, a)

scala> gen(4, 'a')
res22: List[Char] = List(a, a, a, a)

scala> gen[String](4, 'a')

notyy

class AA {
  def /: (s: String) = {
    println("s = " + s)
  }

  def :/ (s: String) = {
    println("s = " + s)
  }
}

notyy

val anyList = List[AnyRef](1:java.lang.Integer)
val strList = List[String]("abc")

def workToAny(xs: List[AnyRef]) = "ok,works"

-----------------------------------------------
scala> val anyList = List[AnyRef](1:java.lang.Integer)
anyList: List[AnyRef] = List(1)

scala> val strList = List[String]("abc")

notyy

case class Rectangle(width:Float,height:Float)

scala> (1 to 10) map (Rectangle(10, _))
res1: scala.collection.immutable.IndexedSeq[Rectangle] = Vector(Rectangle(10.0,1.0), Rectangle(10.0,2.0), Rectangle(10.0,3.0), Rectangle(10.0,4.0), Rectangle(10.0,5.0), Rectangle(10.0,6.0), Rectangle(
10.0,7.0), Rectangle(10.0,8.0), Rectangle(10.0,9.0), Rectangle(10.0,10.0))

notyy

// oo style
trait OShape {
  def area: Double
}

class OCircle(radius: Double) extends OShape {
  def area = radius * radius * Math.Pi
}
class OSquare(length:Double) extends OShape {
  def area = length * length

notyy

object Bf {
  def bf  =  (x:Int) => (y:Int) => (z:Int) => x + y + z
  def bf1(x:Int)(y:Int)(z:Int) = x + y + z
  def bf2(x:Int,y:Int,z:Int) = x + y + z
}

-------------

E:\source\scala\learn>scalac -print bf.scala
[[syntax trees at end of cleanup]]// Scala source: bf.scala

notyy

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

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

scala> :t csum(1) _
Int => Int => Int

scala> :t psum(1,_:Int,_:Int)

notyy

def add(a:Int)(b:Int) = a + b
def plus(a:Int,b:Int) = a + b
val add1 = add(1) _
val plus1 = plus(1,_:Int)


scala> plus1(2)
res17: Int = 3

scala> add1(2)