andy1138

andy1138

package scala.swing

import javax.swing._

object Button {
  def apply(text0: String)(op: => Unit) = new Button(Action(text0)(op))
}

/**
 * A button that can be clicked, usually to perform some action.

andy1138

package org.lsug.csvswing

import swing._
import Swing._
import scala.swing.event.ButtonClicked
import java.io.File
import scala.util.{Failure, Success, Try}
import javax.swing.UIManager

object CSVSwing extends SimpleSwingApplication {

andy1138

package lsug

import java.security.MessageDigest
import java.io.{BufferedInputStream, FileInputStream}


object SchemaString extends App {

  implicit class SchemaHelper(val sc: StringContext) extends AnyVal {
    def schema(a: Any*): String = sc.parts.head.split('\n').map( _.trim).mkString("\n")

andy1138

package lsug

import scala.language.experimental.macros
import scala.reflect.macros.Context


object Debug {
  def error(s:String) = macro error_impl

  def error_impl(c: Context)(s: c.Expr[String]): c.Expr[Unit] = {

andy1138

Call-by-name vs call-by-value

1) Write a timer function, so this will work 
scala> def sleep( n:Int) { Thread.sleep(n) }
scala> timer( sleep(5000) )
scala> Time 5 secs

2) Given
scala> def dTrue = { Thread.sleep(5000); true }
scala> def dFalse = { Thread.sleep(3000); false }

andy1138

/*
* scalac -language:experimental.macros  Macros2.scala  
* scalac -language:experimental.macros  Test.scala
* scala Test
*/


import scala.reflect.makro.Context
import language.experimental.macros

andy1138

http://codekata.pragprog.com/2007/01/kata_four_data_.html

Part One: Weather Data

scala> Source.fromFile("weather.dat").getLines.map( """\s+([0-9]+)""".r.findAllIn(_).toList).filter( _.length > 3 ).map( x => ( x(0).trim.toInt, x(1).trim.toInt - x(2).trim.toInt)).toList.sortBy( _._2 ).last
res51: (Int, Int) = (9,54)