Scala Map类代码示例

//设置package包名称以及导入依赖的类
object Problem011 {

  def main(args: Array[String]) {

    val numbers = """
08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 08
49 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 62 00
81 49 31 73 55 79 14 29 93 71 40 67 53 88 30 03 49 13 36 65
52 70 95 23 04 60 11 42 69 24 68 56 01 32 56 71 37 02 36 91
22 31 16 71 51 67 63 89 41 92 36 54 22 40 40 28 66 33 13 80
24 47 32 60 99 03 45 02 44 75 33 53 78 36 84 20 35 17 12 50
32 98 81 28 64 23 67 10 26 38 40 67 59 54 70 66 18 38 64 70
67 26 20 68 02 62 12 20 95 63 94 39 63 08 40 91 66 49 94 21
24 55 58 05 66 73 99 26 97 17 78 78 96 83 14 88 34 89 63 72
21 36 23 09 75 00 76 44 20 45 35 14 00 61 33 97 34 31 33 95
78 17 53 28 22 75 31 67 15 94 03 80 04 62 16 14 09 53 56 92
16 39 05 42 96 35 31 47 55 58 88 24 00 17 54 24 36 29 85 57
86 56 00 48 35 71 89 07 05 44 44 37 44 60 21 58 51 54 17 58
19 80 81 68 05 94 47 69 28 73 92 13 86 52 17 77 04 89 55 40
04 52 08 83 97 35 99 16 07 97 57 32 16 26 26 79 33 27 98 66
88 36 68 87 57 62 20 72 03 46 33 67 46 55 12 32 63 93 53 69
04 42 16 73 38 25 39 11 24 94 72 18 08 46 29 32 40 62 76 36
20 69 36 41 72 30 23 88 34 62 99 69 82 67 59 85 74 04 36 16
20 73 35 29 78 31 90 01 74 31 49 71 48 86 81 16 23 57 05 54
01 70 54 71 83 51 54 69 16 92 33 48 61 43 52 01 89 19 67 48
""";

    import scala.collection.mutable.Map

    def get4times(numbers: Map[Int, Int])(ruleY: Int, ruleX: Int)(y: Int, x: Int): Int = {
      val num: List[Int] = (
        for {
          i <- 0 to 3;
          yy = (ruleY * i) + y;
          xx = (ruleX * i) + x
          if (yy >= 0 && yy < 20 && xx >= 0 && xx < 20)
        } yield numbers(yy * 100 + xx)).toList

      if (num.length == 4) (1 /: num)(_ * _) // reduce
      else -1
    }

    var i, max = -1;
    val map = Map.empty[Int, Int]

    numbers.trim.split("[\n\\s]").toList.map(_.toInt)
      .foreach((x) => { i += 1; map((i / 20) * 100 + i % 20) = x; });

    for {
      rule <- List((1, 0), (0, 1), (1, 1), (-1, 1))
      i <- 0 to 20;
      j <- 0 to 20
      res = get4times(map)(rule._1, rule._2)(i, j)
      if (res > max)
    } max = res

    println(max)
  }
} 

//设置package包名称以及导入依赖的类
object Problem012 {

  import scala.collection.mutable.Map

  def main(args: Array[String]) {

    var primes = List(2L, 3L, 5L);
    var factorSaved = Map.empty[Long, List[Long]];

    
    def calc(count: Long, isLeftOdd: Boolean): Long = {
      val left: Long = if (isLeftOdd) count else count / 2;
      val right: Long = if (isLeftOdd) (count + 1) / 2 else count + 1;
      val fac = getFactor(left) ::: getFactor(right) // ??? ?? ??

      if (getFactorCount(fac) < 500)  // ??? ??? 500 ? ????? ??
        calc(count + 1, !isLeftOdd)
      else
        left * right
    }

    val start = System.currentTimeMillis();
    println(calc(3, true))  // 3 ?? ????? ????
    val end = System.currentTimeMillis();
    println("???? ", end - start)    
  }
} 

//设置package包名称以及导入依赖的类
package com.orendain.sraw.model

import scala.collection.mutable.Map


case class ListOptions(
    before: String = "",
    after: String = "",
    count: Int = -1,
    limit: Int = -1,
    showAll: Boolean = false,
    sr_detail: Boolean = false
) {

  val toMap = {
    val map = Map.empty[String, String]

    if (count >= 0) map += ("count" -> count.toString)
    if (limit >= 0) map += ("limit" -> limit.toString)
    if (showAll) map += ("show" -> "all")
    if (sr_detail) map += ("sr_detail" -> "true")
    if (!before.isEmpty) map += ("before" -> before)
    else if (!after.isEmpty) map += ("after" -> after)

    map.toMap
  }
}

object ListOptions {
  val Empty = ListOptions()
} 

//设置package包名称以及导入依赖的类
import scala.collection.mutable.Map

class ChecksumAccumulator {
  private var sum = 0
  def add(b: Byte) {sum += b}
  def checksum(): Int = ~(sum & 0xFF) + 1
}

object ChecksumAccumulator {
  private val cache = Map[String, Int]()
  def calculate(s: String): Int = {
    if (cache.contains(s))
      cache(s)
    else {
      val acc = new ChecksumAccumulator
      for (c <- s) acc.add(c.toByte)
      val cs = acc.checksum()
      cache += (s -> cs)
      cs
    }
  }
} 

//设置package包名称以及导入依赖的类
package edu.rosehulman.client

import edu.rosehulman.collections.DistributedMap

import scala.collection.mutable.Map

case class Profile(name: String, email: String, creditcard: String)

object Application extends App {
  val workers = List(
    "akka.tcp://[email protected]:2553/user/worker",
    "akka.tcp://[email protected]:2554/user/worker",
    "akka.tcp://[email protected]:2555/user/worker"
  )
  val map: Map[String, Profile] = new DistributedMap[Profile](workers)
  map += "adam" -> Profile("Adam Michael", "[email protected]", "234567890")
  println("OK Trying get")
  println(map.get("adam"))
} 

//设置package包名称以及导入依赖的类
package akka.util

import scala.collection.mutable.{ Map, MapLike }

import scala.scalajs.js
import js.annotation.JSBracketAccess

final class JSMap[A] private () extends Map[String, A]
                                   with MapLike[String, A, JSMap[A]] {

  private[this] val dict: js.Dictionary[A] = js.Dictionary.empty[A]

  override def empty: JSMap[A] = new JSMap[A]

  override def get(key: String): Option[A] = {
    if (dict.isDefinedAt(key)) Some(dict(key))
    else None
  }

  override def +=(kv: (String, A)): this.type = {
    dict(kv._1) = kv._2
    this
  }

  override def -=(key: String): this.type = {
    dict.delete(key)
    this
  }

  override def iterator: Iterator[(String, A)] = {
    for {
      key <- dict.keys.iterator
    } yield {
      (key, dict(key))
    }
  }
}

object JSMap {
  def empty[A]: JSMap[A] = new JSMap[A]
} 

//设置package包名称以及导入依赖的类
package casl.controls

import scala.collection.mutable.Map
import scala.reflect.ClassTag

class Label[T](val name: String)(implicit c: ClassTag[T]) {
  Label.put(this)

  private var values: Array[T] = Array[T]()
  private var reservedValue: T = _

  def DC(value: T): Unit = {
    this.values = new Array[T](1)
    this.values(0) = value
  }

  def DS(size: Int): Unit = this.values = new Array[T](size)

  def get() = this.getValues()(0)

  def set(value: T): Unit = this.set(0, value)
  def set(position: Int, value: T): Unit = {
    this.values(position) = value
    this.cancelReserve()
  }

  def reserve(value: T) = this.reservedValue = value
  def cancelReserve() = this.reservedValue = null.asInstanceOf[T]

  def asString() = if (this.getValues().isEmpty) "" else this.getValues().mkString("")

  private def getValues(): Array[T] = {
    if (this.reservedValue != null) {
      this.set(0, this.reservedValue)
    }

    return this.values
  }

  override def toString = s"Label{name=$name, values=[${values.mkString(", ")}, reservedValue=$reservedValue]"
}

object Label {
  private val map = Map[String, Label[_]]()

  def put(label: Label[_]) = Label.map.put(label.name, label)
  def get(name: String) = Label.map(name)
} 

//设置package包名称以及导入依赖的类
import scala.collection.mutable.Map
import scala.util.Random


object Caching {

	val TestMap = Map[Int, String]()

	def cache(key: Int) = {

		if(TestMap.size > 1000){

			val random = new Random
			val r_val = TestMap(random.nextInt(TestMap.size)).toInt

			//var r_val = TestMap.toVector(random(TestMap.size))
			TestMap -= r_val
			TestMap += (key -> "Testing val")
		}
		else{
			TestMap += (key -> "Testing val")
		}		
	}

	def time[R](block: => R): R = {  
        val t0 = System.nanoTime()
        val result = block    // call-by-name
        val t1 = System.nanoTime()
        println("Elapsed time: " + (t1 - t0) + "ns")
        result
  	}

	def main(args: Array[String]): Unit = {

		val rand = new Random
		var tot = 0
		for (a <- 0 to 1010){
			if (a > 1005)
				time {cache(rand.nextInt(3000))}
			else
				cache(rand.nextInt(3000))
			
		}

    	val runtime = Runtime.getRuntime
    	println("** Used Memory:  " + (runtime.totalMemory - runtime.freeMemory)/1010)
	}
	
} 

//设置package包名称以及导入依赖的类
package autenticacion.servicios

import autenticacion.modelo.Auth
import java.util.{Date, UUID}
import com.nimbusds.jose.crypto.MACSigner
import com.nimbusds.jose.{JWSAlgorithm, JWSHeader}
import com.nimbusds.jwt.{JWTClaimsSet, SignedJWT}

import scala.collection.JavaConversions._
import scala.collection.mutable.Map

object AutServicios {
  private val ISSUER = "MigranaApp"
  private val SIGNING_KEY = "fasdSsdfalsdkoliieñs9423o4ilñaslñ4ññslkAAÑk6sdlkfaiseo7nalksdmc8m9lsnklfnlaiengldyhsltohsnf0lsinnoi"

  def validarUsuario( aut: Auth ): Option[ String ] = {
    if (true)  //aqui debemos consultar en la bd
      Some(createToken( aut.user ))
    else None
  }

  def createToken(user: String): String = {
    val issued: Long = System.currentTimeMillis()
    val claimsSet: JWTClaimsSet = new JWTClaimsSet()
    claimsSet.setIssueTime(new Date(issued))
    claimsSet.setJWTID(UUID.randomUUID.toString)
    claimsSet.setIssuer(ISSUER)
    val customData = Map[String, String](
      "user" -> user,
      "rol" -> "paciente"
    )
    claimsSet.setCustomClaims(customData)
    val signedJWT: SignedJWT = new SignedJWT(new JWSHeader(JWSAlgorithm.HS256), claimsSet)
    val signer: MACSigner = new MACSigner(SIGNING_KEY)
    signedJWT.sign(signer)
    signedJWT.serialize() // este es el Token
  }


  
} 

//设置package包名称以及导入依赖的类
package io.sweetheart.examples.pis.classesAndObjects

class ChecksumAccumulator {
  private var sum = 0
  def add(b: Byte) { sum += b }
  def checksum(): Int = ~(sum & 0xFF) + 1
}

import scala.collection.mutable.Map

object ChecksumAccumulator {

  private val cache = Map[String, Int]()

  def calculate(s: String): Int =
    if (cache.contains(s))
      cache(s)
    else {
      val acc = new ChecksumAccumulator
      for (c <- s)
        acc.add(c.toByte)
      val cs = acc.checksum()
      cache += (s -> cs)
      cs
    }
} 

//设置package包名称以及导入依赖的类
package io.sweetheart.examples.pis.collections

object Capitals {
  def useImmut(): Unit = {
    var capital = Map("US" -> "Washington", "France" -> "Paris")
    capital += ("Japan" -> "Tokyo")
    println(capital("France"))
  }

  def useMut(): Unit = {
    import scala.collection.mutable.Map
    var capital = Map("US" -> "Washington", "France" -> "Paris")
    capital += ("Japan" -> "Tokyo")
    println(capital("France"))
  }

  def main(args: Array[String]): Unit = {
    useImmut()
    useMut()
  }
} 

//设置package包名称以及导入依赖的类
package applicant.ml.regression.features

import applicant.etl.ApplicantData
import applicant.ml.regression.FeatureSetting
import scala.collection.mutable.{ListBuffer, Map}
import scala.collection.JavaConversions.JListWrapper

class ExperienceFeature(newSetting: FeatureSetting) extends BaseFeature {
  val setting = newSetting

  
  def getFeatureScore(applicant: ApplicantData): Double = {

    val infoMap = setting.values(0).asInstanceOf[Map[String,JListWrapper[AnyRef]]]
    val positionKeywords: ListBuffer[String] = infoMap("positions").asInstanceOf[JListWrapper[String]].toList.to[ListBuffer]
    val degreeKeywords: ListBuffer[String] = infoMap("degrees").asInstanceOf[JListWrapper[String]].toList.to[ListBuffer]
    var rawGPA = applicant.gpa

    //Scale the gpa by the type of degree
    if (checkDegree(applicant.degree, degreeKeywords)) {
      rawGPA = gpaScaler(rawGPA, 0.5)
    } else {
      rawGPA *= gpaScaler(rawGPA, 0.25)
    }

    var positionScore = 0.0
    positionScore = checkPosition(positionScore, applicant.recentTitle, positionKeywords)
    for (position <- applicant.otherTitleList) {
      positionScore = checkPosition(positionScore, applicant.recentTitle, positionKeywords)
    }

    val maxScore = Math.max(rawGPA, positionScore) / 4.0

    return if (maxScore > 1.0) 1.0 else maxScore
  }
} 

//设置package包名称以及导入依赖的类
package models

import scala.collection.mutable.{Stack,Map}
import scala.util._
import edu.neu.coe.scala.numerics.Rational


object RationalMill {

  val conv: String=>Try[Rational] = RationalMill.valueOf _
  val lookup: String=>Option[Rational] = RationalMill.constants.get _
  implicit val store = Map[String,Rational]()
  implicit val parser = new ExpressionParser[Rational](conv,lookup)
  def apply(): Mill[Rational] = new Mill(Stack[Rational]()) {
    def apply(s: String): Try[Rational] = RationalMill.valueOf(s)    
  }
  def valueOf(s: String): Try[Rational] = Try(Rational(s))
 val constants = Map("e"->Rational(BigDecimal(math.E)), "pi"->Rational(BigDecimal(math.Pi)))
} 

//设置package包名称以及导入依赖的类
package models

import scala.collection.mutable.{Stack,Map}
import scala.util._


abstract class Mill[A : Numeric](stack: Stack[A])(implicit store: Map[String,A]) extends Function1[Valuable[A],Try[A]] { self =>
  
  var debugMill = false;
  def value = if (stack.size>0) Success(stack.top) else Failure(new IllegalArgumentException("stack is empty"))
  def toSeq = stack.toSeq
  def show = println(stack)
  def push(x: A) = { if (debugMill) println(s"push $x");stack.push(x)}
  def pop = {val x = stack.pop; if (debugMill) println(s"popped $x"); x}
  def setDebug(b: Boolean) { debugMill = b }
  def has(n: Int) = assert(stack.size>=n,s"operation requires $n element(s) on stack")
 
  def apply(v: Valuable[A]) = v match {
    case n @ Number(x) => n.apply match {case Success(x) => push(x); case Failure(e) => throw e}; value
    case k @ Constant(x) => k.apply match {case Success(x) => push(x); case Failure(e) => throw e}; value
    case Operator(s) => operate(s); value
    case MemInst(s,n) => memInst(s,n); value
  }
  
  def dyadic(f: (A,A)=>A) = { has(2); push(f(pop,pop)) }
  def monoadic(f: (A)=>A) = { has(1); push(f(pop)) }
  def monoadic2(f: (A,A)=>A)(a: A) = { has(1); push(f(a,pop)) }
  
  def operate(s: String): Unit = s match {
    case "+" => operate("plus")
    case "plus" => dyadic(implicitly[Numeric[A]].plus)
    case "-" => operate("chs"); operate("plus")
    case "chs" => monoadic(implicitly[Numeric[A]].negate)
    case "*" => operate("times")
    case "times" => dyadic(implicitly[Numeric[A]].times)
    case "div" => operate("/")
    case "/" => operate("inv"); operate("times")
    case "inv" => val i = implicitly[Numeric[A]]; if (i.isInstanceOf[Fractional[A]]) monoadic2(i.asInstanceOf[Fractional[A]].div _)(i.one)
    case "swap" => has(2); val (top,next) = (pop,pop); push(top); push(next)
    case "del" => has(1); pop
    case "clr" => stack.clear
    case x => throw new IllegalArgumentException(s"operator $x is not supported")
  }
  
  def memInst(s: String, k: String) = s.toLowerCase match {
    case "sto" => value match {case Success(x) => store.put(k,x); case Failure(e) => throw e}
    case "rcl" => store.get(k) match {case Some(x) => push(x); case None => throw new IllegalArgumentException(s"no value at memory location $k")}
  }
  
  def parse(s: String)(implicit parser: ExpressionParser[A]): Try[A] = 
    parser.parseAll(parser.expr,s) match {
      case parser.Success(ws,_) => try {
          (for (w <- ws) yield apply(w)).reverse.head
        } catch {
        case t: Throwable => Failure(t)
      }
      case parser.Failure(e,_) => Failure(new IllegalArgumentException(s"parseResult error: $e"))
      case r @ _ => Failure(new IllegalArgumentException(s"logic error: parseResult is $r"))
    }
} 

//设置package包名称以及导入依赖的类
package models

import scala.collection.mutable.{Stack,Map}
import scala.util._
//

object DoubleMill {
  val conv: String=>Try[Double] = DoubleMill.valueOf _
  val lookup: String=>Option[Double] = DoubleMill.constants.get _
  implicit val store = Map[String,Double]()
  implicit val parser = new ExpressionParser[Double](conv,lookup)
  def apply(): Mill[Double] = new Mill(Stack[Double]()) {
    def apply(s: String): Try[Double] = DoubleMill.valueOf(s)    
  }
  def valueOf(s: String): Try[Double] = Try(s.toDouble)
  val constants = Map("e"->math.E, "pi"->math.Pi)
}