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Overloaded method value trigger with alternatives for '=> Unit' parameter


Overloaded method value trigger with alternatives for '=> Unit' parameter

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Overloaded method value trigger with alternatives for '=> Unit' parameter
Tag : scala , By : dnyaneshwar
Date : October 14 2020, 08:10 PM

will be helpful for those in need Note MyRx.trigger { () => in the error message. First, you need to remove the () => part (it may be on the next line after { as well).
=> Unit as a parameter type is a by-name parameter, it automatically turns a block like { ...; jQuery("#page_content").css("opacity", 1) } into { () => ...; jQuery("#page_content").css("opacity", 1) }.
val _ = jQuery("#page_content").css("opacity", 1)
jQuery("#page_content").css("opacity", 1): Unit
MyRx.trigger({
   // ...
   jQuery("#page_content").css("opacity", 1)
}: Unit)

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Overloaded method value toString with alternatives


Tag : java , By : appdelivery
Date : March 29 2020, 07:55 AM
should help you out The error you're getting starts with the fact that java.util.Arrays has lots of different 'toString' methods and the scala compiler doesn't know which one to pick.
But the real issue is that _ can match any type including Any and we don't have a version of toString that will work with Any - in fact the most general version we have is for AnyRef i.e. Object, which you already match in the previous case. Although toString is defined for many subtypes of AnyVal it isn't defined for Unit
def method1(obj: Any): String = obj match {
    case null => "null"
    case x: Array[AnyRef] => Arrays.deepToString(x)
    case x: Array[AnyVal] => x.mkString("[",",","]")
    case _ => obj.toString
  }

Overloaded method value with alternatives


Tag : scala , By : Epora75
Date : March 29 2020, 07:55 AM
should help you out I have the following: , Actually, the given parameters in the call
case Some(model) => calcUI(model, centerpane.getWidth, centerpane.getHeight, 5, MAX_LEVEL)
def calcUI(model: Model, availableWidth: Double, availableHeight: Double, maxLevel: Int): Option[Group]

overloaded method value + with alternatives


Tag : scala , By : Raghaw
Date : March 29 2020, 07:55 AM
I hope this helps you . I am new to scala, I am trying to create a list with my existing list. , As Marth Suggested the below works.
 votesByLang.map{
 case (witch,counts)=>(witch,counts.foldLeft(0)((x:Int,y)=>x+y._2))}.toSeq

Overloaded method value udf with alternatives


Tag : linux , By : Mariocki
Date : March 29 2020, 07:55 AM
will help you Your UDF syntax looks a bit strange, you shouldn't define the type when calling getData(). In addtion, the input to the UDF should be inside the method itself.
For example, you have a method getData like this (it should have a return value):
def getData(url: String): String = {...}
val getData: (String => String) = {...}
val getDataUDF = udf(getData)
val getDataUDF = udf((url: String) => {
  getData(url)
})

Overloaded method value apply with alternatives:


Tag : scala , By : Ir0nh1de
Date : March 29 2020, 07:55 AM
seems to work fine I am new to spark and I was trying to define a schema for a json data and ran into the following error in (spark-shell, , This happens because of this:
val schema = StructType(Array(StructField("type", 
   StructType(StructField("name", StringType,   true), ...))
val schema = StructType(Array(StructField("type", 
   StructType(Array(StructField("name", StringType,   true), ...)) ...)
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