jasonqu

// http://www.javapractices.com/topic/TopicAction.do?Id=42
// In JDK7
List<String> lines = Files.readAllLines(Paths.get("a.txt"), Charset.forName("utf8"));

Files.write(Paths.get("b.txt"), lines, Charset.forName("utf8"));

// for big file
Path path = Paths.get(aFileName);
try (BufferedReader reader = Files.newBufferedReader(path, ENCODING)){
  String line = null;

jasonqu

// in scala, map type error could be check in compile time
val map = Map(1 -> "a")
map.get("a")

// in java, it cannot
Map<Integer, String> map = new HashMap<>();
map.put(1, "a");
map.get("a");

jasonqu

  // embed db - mapdb
  // libraryDependencies += "org.mapdb" % "mapdb" % "1.0.8"
  val db : DB = DBMaker.newFileDB(new File("tridb"))
    .closeOnJvmShutdown()
    .make()
  val vertices : JMap[Integer,String] = db.getHashMap("idToName-Vertex")
  val vertexNames : JMap[String,Integer] = db.getHashMap("nameToid-Vertex")
  val edges : JMap[Integer,String] = db.getHashMap("idToName-Edge")
  val edgeNames : JMap[String,Integer] = db.getHashMap("nameToid-Edge")

jasonqu

case class Size(width: Double, height: Double)

case class Point(x: Double, y: Double)

case class Row(origin: Point, children: List[Size], hSpacing: Double) {
  lazy val widthWithSpacing = children.map(_.width + hSpacing).sum
  lazy val maxHeight = children.map(_.height).max
  lazy val getRectOrigins: Seq[Point] = {
    children.foldRight(List[Point](origin)) { (curr, points) =>
      points match {

jasonqu

// source in plugin
package sbthello

import sbt._
import Keys._

object HelloPlugin extends AutoPlugin {
  object autoImport {
    val greeting = settingKey[String]("greeting")
    val obfuscate = taskKey[String]("Obfuscates files.")

jasonqu

#!/bin/sh
exec scala "$0" "$@"
!#
/**
 * 目标：格式化md table 表格语法 http://www.tablesgenerator.com/markdown_tables
 * 注意点:文件的编码 涉及到字符串长度的计算
 */
if (args.length < 1 || args.length > 2) {
  println(
    """Usage: scala NormaMdTable.scala inputMdFile [outputMdFile]

jasonqu

package akka.book.essence.chap6.AllForOne

import akka.actor.SupervisorStrategy._
import akka.actor._
import akka.pattern.ask
import akka.util.Timeout

import scala.concurrent.Await
import scala.concurrent.duration._

jasonqu

https://stackoverflow.com/questions/13489398/delete-files-older-than-10-days-using-shell-script-in-unix

Delete files older than 10 days using shell script in Unix

```
find ./my_dir -mtime +10 -type f -delete
```