notyy
/ DelDir.scala
Created
March 4, 2014 09:07
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| import java.io._ | |
| def delDirNoRecur(dirName: String): Unit = { | |
| val dir = new File(dirName) | |
| if(dir.exists && dir.isDirectory){ | |
| val files = dir.listFiles | |
| files.foreach(_.delete()) | |
| println(s"delete complete ${files.size} files deleted") | |
| }else{ | |
| println(s"$dirName not a directory") |
notyy
/ diamondProblem.scala
Last active
August 29, 2015 14:03
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| package diamondProblem | |
| trait A{ | |
| def hello() = println("hello from A") | |
| } | |
| trait B extends A{ | |
| override def hello() = println("hello from B") | |
| } |
notyy
/ performance.scala
Last active
August 29, 2015 14:03
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| package microbenchmarks | |
| import org.scalameter.PerformanceTest | |
| import org.scalameter.api._ | |
| import scala.collection.mutable.ArrayBuffer | |
| object CollectionAppendBenchmark extends PerformanceTest.OfflineReport { | |
| val sizes: Gen[Int] = Gen.range("size")(100, 500, 100) |
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| //this is ok | |
| case class FieldName(name: String){ | |
| def ::[T](v:T): T = v | |
| } | |
| 1 :: (FieldName("yy")) | |
| //doesn't work | |
| case class FieldName(name: String){ |
notyy
/ default.scala
Created
November 25, 2014 02:16
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| class Something{ | |
| var x: Double = _ | |
| var y: String = _ | |
| var z: Char = _ | |
| } | |
| val s = new Something | |
| s.x | |
| s.y | |
| s.z |
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| import scala.io.Source | |
| def b2m(byte: Long): String = s"${byte / 1024 /1024}MB" | |
| val runtime: Runtime = Runtime.getRuntime | |
| println(s"max memory ${b2m(runtime.maxMemory())}MB") | |
| println(s"total memory ${b2m(runtime.totalMemory())}") | |
| println(s"init free memory ${b2m(runtime.freeMemory())}") | |
| val file = Source.fromFile("/Users/twer/source/bigdata/data/new2.dat") | |
| var size = 0 |
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| import java.util.Date | |
| object PerfOfWhile extends App { | |
| def whileLoop(size: Int): Int = { | |
| var c = 0 | |
| while(c < size){ | |
| c += 1 | |
| } | |
| c | |
| } |
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| def onSubmit (func: (String) ⇒ Any): (NodeSeq) ⇒ NodeSeq | |
| execute the String function when the form is submitted. This method returns a function that can be applied to form fields (input, button, textarea, select) and the function is executed when the form containing the field is submitted. | |
| object ChatIn { | |
| | |
| /** | |
| * The render method in this case returns a function | |
| * that transforms NodeSeq => NodeSeq. In this case, | |
| * the function transforms a form input element by attaching | |
| * behavior to the input. The behavior is to send a message |
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| def tryMatch: PartialFunction[Any, Unit] = { | |
| case s:String => println("its a string:" + s) | |
| case (s1:String,s2:String) => println("two strings:" + s1 + " and "+ s2) | |
| case i:Int => println("its a int:" + i) | |
| } |
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| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> | |
| <html xmlns="http://www.w3.org/1999/xhtml"> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> | |
| <title>无标题文档</title> | |
| </head> | |
| <body> | |
| <p> </p> | |
| <input id="shellcommand_in" width="800"/> |
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