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How to avoid passing parameters everywhere in play2?
...chieve it: through actions composition or by using implicit parameters. In Java I suggest using the Http.Context.args map to store useful values and retrieve them from the templates without having to explicitly pass as templates parameters.
Using implicit parameters
Place the menus parameter at th...
Why is Java's Iterator not an Iterable?
...urn iterator;
}
}
return new SingleUseIterable();
}
In Java 8 adapting an Iterator to an Iterable gets simpler:
for (String s : (Iterable<String>) () -> iterator) {
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...
How to write to a file in Scala?
... File - File is a File (called Path) API that is based on a combination of Java 7 NIO filesystem and SBT PathFinder APIs.
Path and FileSystem are the main entry points into the Scala IO File API.
import scalax.io._
val output:Output = Resource.fromFile("someFile")
// Note: each write will o...
Java inner class and static nested class
...is the main difference between an inner class and a static nested class in Java? Does design / implementation play a role in choosing one of these?
...
“Unknown provider: aProvider
...urself a world of hurt by using ngStrictDi directive with ngApp:
<html lang="en" ng-app="myUglifiablyGreatApp" ng-strict-di>
Now — pre-minification — anything that doesn't use annotations will blow up your console and you can see the friggin' name without hunting through mangled stack t...
Why java.util.Optional is not Serializable, how to serialize the object with such fields
...o serialize object with enums. The other case is where class has fields of java.util.Optional class. In this case the following exception is thrown: java.io.NotSerializableException: java.util.Optional
...
IntelliJ Organize Imports
...e an Organize Imports feature similar to that in Eclipse?
What I have is a Java file with multiple classes missing their imports. Example:
...
How do CDI and EJB compare? interact?
...anaged by EJB container.
Seems that CDI does understand what EJB is, so in Java EE 6 compliant server, in your servlet you can write both
@EJB EJBService ejbService;
and
@Inject EJBService ejbService;
that's what can make you confusing, but that's probably the only thing which is the bridge betwee...
The performance impact of using instanceof in Java
...
Modern JVM/JIC ..COuld you please mention from which java version these optimiszation have been covered?
– Ravisha
Dec 3 '10 at 9:50
146
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What does Class mean in Java?
...ific type.
Reference about Generics and Wildcards: http://docs.oracle.com/javase/tutorial/java/generics/wildcards.html
Reference about Class object and reflection (the feature of Java language used to introspect itself): https://www.oracle.com/technetwork/articles/java/javareflection-1536171.html
...