41 questions
Thank you for your help.I'm a beginner at scala. I'm worried because I don't know the reason for the following code behavior.scala>case class MyVector [A]() { def test(init:A) = { println(type=+ini...
Thank you for your help.I'm a beginner at scala. I'm worried because I don't know the reason for the following code behavior.scala>case class MyVector [A]() { def test(init:A) = { println(type=+ini...
Is there any way to comprehensively capture the supplementation of exceptions in play framework (2.3)?GlobalSettings.onError captures exceptions during normal request processing.defaction=Action{ Ok.c...
Is there any way to comprehensively capture the supplementation of exceptions in play framework (2.3)?GlobalSettings.onError captures exceptions during normal request processing.defaction=Action{ Ok.c...
Scala is trying to use the overloaded method provided in Java's library.class X { public<E>voidf(E...values) {System.out.println(1);} public void f(Object value) {System.out.println(2);}}However...
I have created the following forms in playframework (2.5.6) case class User (age: Option [Int])value form = Form( mapping( age - > optional (number) (User.apply) (User.unapply))println(form.bindFro...
Do you want to improve this question?Edit this post and update the question to focus on one issueClosed 7 years ago.7 years agoRecently, I've been thinking about reading a glass book and entering the ...
How should I pass an implicit parameter when I create a function object?If you do not specify anything, you will get an error (in the part of val process=): case class Cache (key:Int, value: String)US...
As the sample code used a library called spray, I tried using the interpreter and got the following error:Scala itself has only just started recently, and I don't know how to deal with these cases.I t...
It hasn't been long since I committed to apache park, but I recently had an error when I debacked the park object (park LR) from the example module.Specifically, the following message appears:C:\Users...
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