41 questions
Suppose you run the following programs:sealed trace Exprcase class N(n:Int)extends Exprcase class Var(x:String, a:Int, n:Int)extendsExprcase class Add (n:Expr*) extensions Exprcase class Mul(n:Expr*) ...
I installed sbt because I wanted to use scala on my company PC, but when I tried sbt new, I couldn't get the plug-in.I found a way to configure proxy settings in Qiita, so I tried it, but it didn't wo...
If you want to receive an option for a function that may return null, for example, valfuge=Option(nullablefunc())defaultwice(one:Option [Int]) = { one.map(2*)}value result=twice (fuge.asInstanceOf [Op...
It's been a few months since I started learning scala+play.I'm trying to implement fileupload, and I'd like to have a view that displays identity using silhouette, but I don't know how to write it.The...
I use Scala to develop web applications in Play Framework.Until yesterday, the development was going well, but Activator(sbt) did not compile CoffeeScript and auto-reloading did not work anymore.I can...
If there is an error when compiling from the sbt console, I would like it to stop as soon as possible.When compiling continuously, such as ~compile, there is a very meaningless error in the back and y...
The paths are as follows: which scala/usr/local/bin/scalaimport java.awt.image.BufferedImageimport java.awt.Color/** * View the Mandelbrot Set. */object Mandelblot { /** * Create an image. */ create...
Until now, I thought that I should import EventListener to detect any event without thinking too much about it.However, I am looking into the internal handling of EventListener.There are pages like th...
I am creating a WEB API in playframework 2.x, but I get a Bad Request error when the url parameter contains %.For example, when searching with the string 20% off...Bad Request For request 'GET/search?...
We are testing the load using Gatling.Number of users: 1Interval: 600 secondssetUp(scn.inject(rampUsers(1)during(600 seconds))).protocols(httpProtocol)We are conducting a load test under this conditio...
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