Scala DynamicVariable类代码示例

本文整理汇总了Scala中scala.util.DynamicVariable类的典型用法代码示例。如果您正苦于以下问题：Scala DynamicVariable类的具体用法？Scala DynamicVariable怎么用？Scala DynamicVariable使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了DynamicVariable类的9个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Scala代码示例。

示例1: TaskScheduler

//设置package包名称以及导入依赖的类
import java.util.concurrent._
import scala.util.DynamicVariable

package object common {

  val forkJoinPool = new ForkJoinPool

  abstract class TaskScheduler {
    def schedule[T](body: => T): ForkJoinTask[T]
    def parallel[A, B](taskA: => A, taskB: => B): (A, B) = {
      val right = task {
        taskB
      }
      val left = taskA
      (left, right.join())
    }
  }

  class DefaultTaskScheduler extends TaskScheduler {
    def schedule[T](body: => T): ForkJoinTask[T] = {
      val t = new RecursiveTask[T] {
        def compute = body
      }
      Thread.currentThread match {
        case wt: ForkJoinWorkerThread =>
          t.fork()
        case _ =>
          forkJoinPool.execute(t)
      }
      t
    }
  }

  val scheduler =
    new DynamicVariable[TaskScheduler](new DefaultTaskScheduler)

  def task[T](body: => T): ForkJoinTask[T] = {
    scheduler.value.schedule(body)
  }

  def parallel[A, B](taskA: => A, taskB: => B): (A, B) = {
    scheduler.value.parallel(taskA, taskB)
  }

  def parallel[A, B, C, D](taskA: => A, taskB: => B, taskC: => C, taskD: => D): (A, B, C, D) = {
    val ta = task { taskA }
    val tb = task { taskB }
    val tc = task { taskC }
    val td = taskD
    (ta.join(), tb.join(), tc.join(), td)
  }
}

开发者ID:tadjik1，项目名称:Barnes-Hut-Simulation，代码行数:53，代码来源:package.scala

示例2: Signal

//设置package包名称以及导入依赖的类
package observatory

import scala.util.DynamicVariable

class Signal[T](expr: => T) {
  import Signal._
  private var myExpr: () => T = _
  private var myValue: T = _
  private var observers: Set[Signal[_]] = Set()
  private var observed: List[Signal[_]] = Nil
  update(expr)

  protected def computeValue(): Unit = {
    for (sig <- observed)
      sig.observers -= this
    observed = Nil
    val newValue = caller.withValue(this)(myExpr())
    
    //if (myValue != newValue) {
    myValue = newValue
    val obs = observers
    observers = Set()
    obs.foreach(_.computeValue())
    //}
  }

  protected def update(expr: => T): Unit = {
    myExpr = () => expr
    computeValue()
  }

  def apply() = {
    observers += caller.value
    assert(!caller.value.observers.contains(this), "cyclic signal definition")
    caller.value.observed ::= this
    myValue
  }
}

class Var[T](expr: => T) extends Signal[T](expr) {
  override def update(expr: => T): Unit = super.update(expr)
}

object Var {
  def apply[T](expr: => T) = new Var(expr)
}

object NoSignal extends Signal[Nothing](???) {
  override def computeValue() = ()
}

object Signal {
  val caller = new DynamicVariable[Signal[_]](NoSignal)
  def apply[T](expr: => T) = new Signal(expr)
}

开发者ID:syhan，项目名称:coursera，代码行数:56，代码来源:Signal.scala

示例3: TaskScheduler

//设置package包名称以及导入依赖的类
import java.util.concurrent._
import scala.util.DynamicVariable

package object common {

  val forkJoinPool = new ForkJoinPool

  abstract class TaskScheduler {
    def schedule[T](body: => T): ForkJoinTask[T]
    def parallel[A, B](taskA: => A, taskB: => B): (A, B) = {
      val right = task {
        taskB
      }
      val left = taskA
      (left, right.join())
    }
  }

  class DefaultTaskScheduler extends TaskScheduler {
    def schedule[T](body: => T): ForkJoinTask[T] = {
      val t = new RecursiveTask[T] {
        def compute = body
      }
      Thread.currentThread match {
        case wt: ForkJoinWorkerThread =>
          t.fork()
        case _ =>
          forkJoinPool.execute(t)
      }
      t
    }
  }

  val scheduler =
    new DynamicVariable[TaskScheduler](new DefaultTaskScheduler)

  def task[T](body: => T): ForkJoinTask[T] = {
    scheduler.value.schedule(body)
  }

  def parallel[A, B](taskA: => A, taskB: => B): (A, B) = {
    scheduler.value.parallel(taskA, taskB)
  }

  def parallel[A, B, C, D](taskA: => A, taskB: => B, taskC: => C, taskD: => D): (A, B, C, D) = {
    val ta = task { taskA }
    val tb = task { taskB }
    val tc = task { taskC }
    val td = taskD
    (ta.join(), tb.join(), tc.join(), td)
  }

}

开发者ID:syhan，项目名称:coursera，代码行数:54，代码来源:package.scala

示例4: Signal

//设置package包名称以及导入依赖的类
package calculator

import scala.util.DynamicVariable

class Signal[T](expr: => T) {
  import Signal._
  private var myExpr: () => T = _
  private var myValue: T = _
  private var observers: Set[Signal[_]] = Set()
  private var observed: List[Signal[_]] = Nil
  update(expr)

  protected def computeValue(): Unit = {
    for (sig <- observed)
      sig.observers -= this
    observed = Nil
    val newValue = caller.withValue(this)(myExpr())
    
    //if (myValue != newValue) {
      myValue = newValue
      val obs = observers
      observers = Set()
      obs.foreach(_.computeValue())
    //}
  }

  protected def update(expr: => T): Unit = {
    myExpr = () => expr
    computeValue()
  }

  def apply() = {
    observers += caller.value
    assert(!caller.value.observers.contains(this), "cyclic signal definition")
    caller.value.observed ::= this
    myValue
  }
}

class Var[T](expr: => T) extends Signal[T](expr) {
  override def update(expr: => T): Unit = super.update(expr)
}

object Var {
  def apply[T](expr: => T) = new Var(expr)
}

object NoSignal extends Signal[Nothing](???) {
  override def computeValue() = ()
}

object Signal {
  val caller = new DynamicVariable[Signal[_]](NoSignal)
  def apply[T](expr: => T) = new Signal(expr)
}

开发者ID:syhan，项目名称:coursera，代码行数:56，代码来源:Signal.scala

示例5: TaskScheduler

//设置package包名称以及导入依赖的类
import java.util.concurrent._
import scala.util.DynamicVariable

package object common {

  val forkJoinPool = new ForkJoinPool

  abstract class TaskScheduler {
    def schedule[T](body: => T): ForkJoinTask[T]
    def parallel[A, B](taskA: => A, taskB: => B): (A, B) = {
      val right = task {
        taskB
      }
      val left = taskA
      (left, right.join())
    }
  }

  class DefaultTaskScheduler extends TaskScheduler {
    def schedule[T](body: => T): ForkJoinTask[T] = {
      val t = new RecursiveTask[T] {
        def compute = body
      }
      forkJoinPool.execute(t)
      t
    }
  }

  val scheduler =
    new DynamicVariable[TaskScheduler](new DefaultTaskScheduler)

  def task[T](body: => T): ForkJoinTask[T] = {
    scheduler.value.schedule(body)
  }

  def parallel[A, B](taskA: => A, taskB: => B): (A, B) = {
    scheduler.value.parallel(taskA, taskB)
  }

  def parallel[A, B, C, D](taskA: => A, taskB: => B, taskC: => C, taskD: => D): (A, B, C, D) = {
    val ta = task { taskA }
    val tb = task { taskB }
    val tc = task { taskC }
    val td = taskD
    (ta.join(), tb.join(), tc.join(), td)
  }

}

开发者ID:twistedgut，项目名称:scala_coursera，代码行数:49，代码来源:package.scala

示例6: Signal

//设置package包名称以及导入依赖的类
package calculator

import scala.util.DynamicVariable

class Signal[T](expr: => T) {
  import Signal._
  private var myExpr: () => T = _
  private var myValue: T = _
  private var observers: Set[Signal[_]] = Set()
  private var observed: List[Signal[_]] = Nil
  update(expr)

  protected def computeValue(): Unit = {
    for (sig <- observed) {
      sig.observers -= this
    }
    observed = Nil
    val newValue = caller.withValue(this)(myExpr())
    
    //if (myValue != newValue) {
      myValue = newValue
      val obs = observers
      observers = Set()
      obs.foreach(_.computeValue())
    //}
  }

  protected def update(expr: => T): Unit = {
    myExpr = () => expr
    computeValue()
  }

  def apply() = {
    observers += caller.value
    assert(!caller.value.observers.contains(this), "cyclic signal definition")
    caller.value.observed ::= this
    myValue
  }
}

class Var[T](expr: => T) extends Signal[T](expr) {
  override def update(expr: => T): Unit = super.update(expr)
}

object Var {
  def apply[T](expr: => T) = new Var(expr)
}

object NoSignal extends Signal[Nothing](???) {
  override def computeValue() = ()
}

object Signal {
  val caller = new DynamicVariable[Signal[_]](NoSignal)
  def apply[T](expr: => T) = new Signal(expr)
}

开发者ID:adihubba，项目名称:scalaProgFunc，代码行数:57，代码来源:Signal.scala

示例7: buffer

//设置package包名称以及导入依赖的类
package com.github.kmizu
import language.dynamics
import scala.xml._
import scala.util.DynamicVariable

package object xbuilder {
  object % extends Dynamic {
    private[this] val scope = new DynamicVariable[NodeBuffer](new NodeBuffer)
    def buffer(content: => Any): NodeBuffer = {
      scope.withValue(new NodeBuffer) {
        content
        scope.value
      }
    }
    def applyDynamic(name: String)(content: => Any): Node = {
      val evaledContent = content
      if(name == "text" && evaledContent.isInstanceOf[String]) {
        val text = Text(evaledContent.asInstanceOf[String])
        scope.value += text
        text
      } else {
        this.applyDynamicNamed(name)(Seq():_*)(content)
      }
    }
    def selectDynamic(name: String): Node = applyDynamic(name)(null)
    def applyDynamicNamed(name: String)(attributes: (String, String)*)(block: => Any): Elem = {
      def createMetaData(attributeList: List[(String, String)]): MetaData = attributeList match {
        case Nil => Null
        case (key, value) :: xs => new UnprefixedAttribute(key, value, createMetaData(xs))
      }
      var attributeList : List[(String, String)] = attributes.toList.reverse
      var metadata: MetaData = createMetaData(attributeList)
      val newElement = scope.withValue(new NodeBuffer) {
        block
        Elem(null, name, metadata, TopScope, true, scope.value.toSeq:_*)
      }
      scope.value += newElement
      newElement
    }
  }
}

开发者ID:kmizu，项目名称:xbuilder，代码行数:42，代码来源:package.scala

示例8: Signal

//设置package包名称以及导入依赖的类
package week04.frp

import scala.util.DynamicVariable

class Signal[T](expr: => T) {
  import Signal._
  private var myExpr: () => T = _
  private var myValue: T = _
  private var observers: Set[Signal[_]] = Set()
  private var observed: List[Signal[_]] = Nil
  update(expr)

  protected def computeValue(): Unit = {
    for (sig <- observed)
      sig.observers -= this
    observed = Nil
    val newValue = caller.withValue(this)(myExpr())

    if (myValue != newValue) {
      myValue = newValue
      val obs = observers
      observers = Set()
      obs.foreach(_.computeValue())
    }
  }

  protected def update(expr: => T): Unit = {
    myExpr = () => expr
    computeValue()
  }

  def apply() = {
    observers += caller.value
    assert(!caller.value.observers.contains(this), "cyclic signal definition") // s() = s() + 1
    caller.value.observed ::= this
    myValue
  }
}

object NoSignal extends Signal[Nothing](???) {
  override def computeValue() = ()
}


object Signal {
  val caller = new DynamicVariable[Signal[_]](NoSignal)
  def apply[T](expr: => T) = new Signal(expr)
}

开发者ID:juliocnsouzadev，项目名称:scala_datascience，代码行数:49，代码来源:Signal.scala

示例9: Signal

//设置package包名称以及导入依赖的类
package week04

import scala.util.DynamicVariable

class Signal[T](expr: => T){
  import Signal._
  private var myExpr: ()=>T = _
  private var myValue: T = _
  private var observers: Set[Signal[_]] = Set()
  update(expr)

  protected def update(expr: => T):Unit ={
    myExpr = () => expr
    computeValue()
  }
  protected def computeValue():Unit ={
    val newValue = caller.withValue(this)(myExpr())
    if(myValue!=newValue){
      myValue = newValue
      val obs = observers
      observers = Set()
      obs.foreach(_.computeValue())
    }
  }
  def apply(): T = {
    observers += caller.value
    assert(!caller.value.observers.contains(this), "cyclic redundancy error")
    myValue
  }
}

object NoSignal extends Signal[Nothing](???) {
  override def computeValue() = ()
}

object Signal{
  private val caller = new DynamicVariable[Signal[_]](NoSignal)
  def apply[T](expr: => T) = new Signal(expr)
}

class Var[T](expr: => T) extends Signal[T](expr){
  override def update(expr: => T): Unit = super.update(expr)
}

object Var {
  def apply[T](expr: => T) = new Var(expr)
}

// observables
class StackableVariable[T](init: T) {
  private var values: List[T] = List(init)
  def value: T = values.head
  def withValue[R](newValue: T)(op: => R): R = {
    values = newValue :: values
    try op finally values = values.tail
  }
}

开发者ID:purukaushik，项目名称:fn-program-design，代码行数:58，代码来源:Signal.scala

注：本文中的scala.util.DynamicVariable类示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。