Question

我有这个向量：

val imageIds = Vector(
  "XXXX1",
  "XXXX2",
  "XXXX3"
)

我目前使用以下方法创建一个数组：

def makeTheImageDataArray: Vector[JsObject] = {
  imageIds.map(SingleImageData(_, "theURL", "theStatus").asJsObject)
}

具有此案例类：

case class SingleImageData(ImageId: String, URL: String, Status: String) {
  def imageId: String = ImageId
  def getURL: String = URL
  def status: String = Status

  def asJsObject: JsObject = JsObject(
    "ImageId" -> JsString(imageId),
    "URL" -> JsString(getURL),
    "Status" -> JsString(status)
  )
}

哪个会产生：

Vector(
  {"ImageId":"XXXX1","URL":"theURL","Status":"theStatus"},
  {"ImageId":"XXXX2","URL":"theURL","Status":"theStatus"},
  {"ImageId":"XXXX3","URL":"theURL","Status":"theStatus"}
)

我不想创建一个Vector，而是要创建一个HashMap，以ImageId作为键，即：

Map(
  XXX1 -> {"URL":"theURL","Status":"theStatus"},
  XXX2 -> {"URL":"theURL","Status":"theStatus"},
  XXX3 -> {"URL":"theURL","Status":"theStatus"}
)

谁能告诉我该怎么做？

Answer 1

从"ImageId" -> JsString(imageId)中删除asJsObject，然后

imageIds.map(id => id -> SingleImageData(id, "theURL", "theStatus").asJsObject).toMap

或者如果SingleImageData不需要知道ID，则从SingleImageData中完全删除ImageID，然后

imageIds.map(_ -> SingleImageData("theURL", "theStatus").asJsObject).toMap

如何从Scala中的向量创建HashMap

1 个答案: