帮同事处理List[scala.collection.immutable.Map[String,Any]]
的排序问题
原来想的办法是
var x = mylist.sortWith(_.get("commonCount").toString > _.get("commonCount").toString)
_.get("commonCount")
可以取出值,但类型是 Some
,要用_.get("commonCount").get
来获取真实类型
scala> println(mylist.map(_.get("commonCount").get.getClass))
List(class java.lang.Integer, class java.lang.Integer, class java.lang.Integer, class java.lang.Integer, class java.lang.Integer)
知道真实的数据类型,但在实际使用时要转换成基本类型.asInstanceOf[Int]
,进行判断
mylist.sortWith((x, y) => x.get("commonCount").get.asInstanceOf[Int] < y.get("commonCount").get.asInstanceOf[Int]))
另一种方法:
mylist.sortWith(_.get("commonCount").get.asInstanceOf[Int] < _.get("commonCount").get.asInstanceOf[Int])
源码:
import scala.collection.immutable.{HashMap, List}
/**
* Created by 185378641@qq.com on 2017/12/7.
*
* @author jiangtao
*
* [
* {
* "treatmentMoney": 0,
* "hospital": "湖南中医学院第二附属医院湖南省中医院",
* "commonCount": 2,
* "department": "主治医师",
* "departmentFunction": "a19ec1789ab711e7a9ff408d5c916e3f",
* "docId": "3291ba79901e42bfb756745fb803df64",
* "joinedClinic": [
* "马冬梅--陈小春"
* ],
* "docName": "马冬梅--陈小春--张三"
* },
* {
* "treatmentMoney": 0,
* "hospital": "湖南中医学院第二附属医院湖南省中医院",
* "commonCount": 1,
* "department": "主治医师",
* "departmentFunction": "a19ec1789ab711e7a9ff408d5c916e3f",
* "docId": "1ec9303c79df48d9988bd7bce4370c0e",
* "joinedClinic": [
* "马冬梅--陈小春--张三",
* "小二"
* ],
* "docName": "麻子"
* }
* ]
*/
object Main extends App {
println("hello world")
//
// val days = List(
// "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
// )
var one = Map(
"docName" -> "马冬梅",
"commonCount" -> 11
)
var two = Map(
"docName" -> "麻子",
"commonCount" -> 23
)
var three = Map(
"docName" -> "麻子",
"commonCount" -> 3
)
var four = Map(
"docName" -> "麻子",
"commonCount" -> 19
)
var five = Map(
"docName" -> "麻子",
"commonCount" -> 5
)
var mylist = List(one, two, three, four, five)
println(mylist.sortWith((x, y) => x.get("commonCount").get.asInstanceOf[Int] > y.get("commonCount").get.asInstanceOf[Int]))
println(mylist.sortWith((x, y) => x.get("commonCount").get.asInstanceOf[Int] < y.get("commonCount").get.asInstanceOf[Int]))
// println(mylist.sortWith((x,y) => x.get("commonCount"))
// mylist.toList.foreach(i => println(i.get("commonCount").getClass))
//
// var x = Map(
// "a" -> 1,
// "b" -> "b"
// )
// var y = Map(
// "a" -> 11,
// "b" -> "b"
// )
// var z = Map(
// "a" -> 3,
// "b" -> "b"
// )
// println(x.get("a").get.getClass)
// println(y.get("a").get.getClass)
// println(z)
//
// var xyz = List(x, y, z)
// println(xyz.sortBy(_.get("a").get))
/*
* test
*/
// print(mylist.sorted)
// print(mylist.flatMap(i => i.get("commonCount")).sortBy(_))
// print(mylist.map(i => i.get("commonCount")).sortWith((x,y) => x > y ))
// print(mylist.map(i => i.get("commonCount")).sortWith(_.toString > _.toString))
// print(mylist.sortBy(i =>(i.get("commonCount"))))
// print(mylist.sortBy(_.get("commonCount")))
// print(mylist.map(_.foreach(println)))
// print(mylist.map(_.get("commonCount")).foreach(println))
// print(mylist.sortWith(_.get("commonCount").toString > _.get("commonCount").toString))
// println(mylist.sortWith(_.get("commonCount").toString < _.get("commonCount").toString))
// println(mylist.sortBy(_.get("commonCount").toString))
// println(mylist.sortBy(_.values))
// println(mylist.sorted(Ordering.Int.reverse))
// println(mylist.sortBy(_.get("commonCount")))
// println(mylist.groupBy(_.get("commonCount")))
// println(mylist.sortWith(_.foreach(println(_._2))))
// println(mylist.map(_.mapValues()))
// println(mylist.sortBy(i => i.get("commonCount").toString ))
// println(mylist.sortBy(i => (x = i.get("commonCount"),y=i.get("commonCount") )=>
// println(mylist.sortWith((x,y)=>x.get("commonCount").toString > y.get("commonCount").toString))
// println(mylist.sortWith((x, y) => x.get("commonCount").toString.compareTo(y.get("commonCount").toString)<0))
// println(mylist.sortWith((x, y) => x.get("commonCount").toString.compare(y.get("commonCount").toString) < 0))
// println(mylist.sortWith(_.get("commonCount") < _.get("commonCount")))
// println(mylist.sortBy(_.get("commonCount").foreach(println)))
// println(mylist.sortWith(_.get("commonCount").toString > _.get("commonCount").toString))
// println(mylist.sortWith((x, y) => x.get("commonCount").toString < y.get("commonCount").toString))
// println(mylist.sorted((x, y) => x.get("commonCount").toString.compareTo(y.get("commonCount").toString)))
// println(mylist.sortBy(i => (i.get("commonCount").toString.charAt(0),i.get("commonCount").toString.charAt(1))))
// print(mylist.sortBy(_.get("commonCount")))
// print(mylist.map(_.get("commonCount") < _.get("commonCount")): _*))
// print(mylist.sortBy(i => i.get("commonCount")))
// print(mylist.map(_.get("commonCount")).sortBy{_}:_*)
// print(mylist.sortWith(_.get("commonCount") > ).toSeq)
// var v = mylist.groupBy(_.get("commonCount"))
// println(v.keys.toList.foreach(println(_)))
// println(v.take(1).foreach(println))
// val newMap = mylist.sortBy().foldLeft(new ListMap[String, String]) {
// (map, key) => map + (key._1 -> key._2)
// is ok
// var a = Item("马冬梅", 2, "主任")
// var b = Item("麻子", 9, "主任")
// var c = Item("麻子", 11, "主任")
// var d = Item("麻子", 5, "主任")
//
// var mylist = List(a, b, c, d)
// println(mylist.sortWith((x,y) => x.commonCount.compare(y.commonCount)>0))
// println(mylist.sortBy(i => i.commonCount))
// var mymap = List(a,b,c,d).sortBy()
// print(mymap)
// var mylist =Map(one.get("commonCount")->one,two.get("commonCount")->two,three.get("commonCount")->three).toList.sortBy{_._2}:_*
// var mylist = listMap(Map(one->one.get("commonCount"),two.toString()->two.get("commonCount"),three.toString()->three.get("commonCount")).toList.sortBy{_._2}:_*)
// var listMap = ListMap(Map("foo"->3, "raise"->1, "the"->2, "bar"->4,"bar1"->4).toList.sortBy{_._2}:_*)
}
case class Item(docName: String, commonCount: Int, departmentName: String)
//
//class Doctor {
//
// object docId
//
// object getRealName
//
// object getDepartmentName
//
// object getDepartmentFunctionId
//
// object getHospitalName
//
var getTreatmentMoney
//
// var commonCount:String
//
// override def toString = commonCount
//
//}
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