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Compiler Ambiguous invocation error - anonymous method and method group with Func or Action
... method group syntax rather than anonymous methods (or lambda syntax) for calling a function.
4 Answers
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Missing return statement in a non-void method compiles
... the compiler even warn about returning something? Or why would a language allow us to have a non-void method having an infinite loop and not returning anything?
...
Difference between the Apache HTTP Server and Apache Tomcat? [closed]
...Rchive) file, and just drop it in the deploy directory in Tomcat.
So basically Apache is an HTTP Server, serving HTTP. Tomcat is a Servlet and JSP Server serving Java technologies.
Tomcat includes Catalina, which is a servlet container. A servlet, at the end, is a Java class. JSP files (which are ...
Rest with Express.js nested router
...other words, is there an explicit way to write the registration or access calls such that the item router lets us know it expects to be passed a user id? Example situation, the item router is in another file altogether, structurally it isn't clear that it requires a user unless you get into its call...
What is the difference between Serializable and Externalizable in Java?
...ava.io.Serializable but with custom-written mechanisms to perform the marshalling and unmarshalling functions (you need to implement readExternal and writeExternal methods on your class). This gives you the means to get around the reflection performance bottleneck.
In recent versions of Java (1.3 ...
What does “S3 methods” mean in R?
...:
setting the class of objects of
interest (e.g.: the return value of a
call to method glm has class glm)
providing a method with the general
name (e.g. print), then a dot, and
then the classname (e.g.:
print.glm)
some preparation has to have been
done to this general name (print)
for this to work...
Collections.emptyMap() vs new HashMap()
...need to explicitly type out the generic type of the collection - it's generally just inferred from the context of the method call.
They're more efficient because they don't bother creating new objects; they just re-use an existing empty and immutable object. This effect is generally very minor, b...
GSON throwing “Expected BEGIN_OBJECT but was BEGIN_ARRAY”?
...pe. You can't just try and cast the result like that and expect it to magically work ;)
The User guide for Gson Explains how to deal with this:
https://github.com/google/gson/blob/master/UserGuide.md
This will work:
ChannelSearchEnum[] enums = gson.fromJson(yourJson, ChannelSearchEnum[].class);
...
How to compare Unicode characters that “look alike”?
I fall into a surprising issue.
10 Answers
10
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Why do we not have a virtual constructor in C++?
...e and Technique FAQ Why don't we have virtual constructors?
A virtual call is a mechanism to get work done given partial
information. In particular, "virtual" allows us to call a function
knowing only any interfaces and not the exact type of the object. To
create an object you need complet...