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“Least Astonishment” and the Mutable Default Argument
... languages have this problem to some extent. Here's a question: suppose in Java I have the following code:
StringBuffer s = new StringBuffer("Hello World!");
Map<StringBuffer,Integer> counts = new HashMap<StringBuffer,Integer>();
counts.put(s, 5);
s.append("!!!!");
System.out.println( c...
Maven: how to override the dependency added by a library
....version</version>
<exclusions>
<!-- STAX comes with Java 1.6 -->
<exclusion>
<artifactId>stax-api</artifactId>
<groupId>javax.xml.stream</groupId>
</exclusion>
<exclusion>
<artifactId>stax-api<...
Android custom dropdown/popup menu
... with Kotlin refer my answer here.
To create a popup menu in android with Java:
Create a layout file activity_main.xml under res/layout directory which contains only one button.
Filename: activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:...
How to get the ThreadPoolExecutor to increase threads to max before queueing?
... ExecutorService thread-pools that so many of us use. To quote from the Javadocs:
9 Answers
...
Further understanding setRetainInstance(true)
...ethod.
And the docs link to a very good example - FragmentRetainInstance.java which I have reproduced below for your convenience. It does exactly what I speculated was the answer in my question (if (...findFragmentByTag() == null) { ...).
Finally, I created my own test activity to see exactly wha...
What is the difference between mocking and spying when using Mockito?
...ks and it was confusing for some users. Read more about spying: here or in javadoc for spy(Object) method.
callRealMethod() was introduced after spy(), but spy() was left there of course, to ensure backward compatibility.
Otherwise, you're right: all the methods of a spy are real unless stubbed. Al...
When to use the different log levels
...
About Debug <-> Trace: Note that at least in Java-land, the order of priority is "debug > trace". That's the convention all logging frameworks I know use (SLF4J, Logback, log4j, Apache Commons Logging, Log4Net, NLog). So Debug < Trace seems unusual to me.
...
No == operator found while comparing structs in C++
...even within a given program. For entity objects, the solution provided by Java works very well (and of course, you can do exactly the same thing in C++---it's even idiomatic C++ for entity objects). The question is what to do about value objects. C++ provides a default operator= (even if it often...
how to ignore namespaces with XPath
...
Take a look at this tutorial: codesimplify.com/java/java-xpath-ignore-namespace-example
– hipokito
Jun 13 '17 at 13:02
1
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In a PHP project, what patterns exist to store, access and organize helper objects? [closed]
...e-have-all-singletons-gone.html
Alternatives
a service provider
http://java.sun.com/blueprints/corej2eepatterns/Patterns/ServiceLocator.html
dependency injection
http://en.wikipedia.org/wiki/Dependency_injection
and a php explanation:
http://components.symfony-project.org/dependency-injection...