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Why is “final” not allowed in Java 8 interface methods?
... methods did not seem to be worth the effort of restructuring the internal call resolution mechanisms". This is speculation, of course, but it is at least backed by subtle evidences, like this Statement (by one of the two persons) in the OpenJDK mailing list:
"I suppose if "final default" method...
Why does changing the returned variable in a finally block not change the return value?
...ough the return statement has finished), so those changes occur before the calling code sees the returned value.
– Ted Hopp
Apr 17 '13 at 14:08
...
What is copy-on-write?
...egy used in computer programming. The fundamental idea is that if multiple callers ask for resources which are initially indistinguishable, you can give them pointers to the same resource. This function can be maintained until a caller tries to modify its "copy" of the resource, at which point a tru...
Android NDK C++ JNI (no implementation found for native…)
...g to load the .so at all. Are you sure that System.loadLibrary() is being called before the method is used?
If you don't have a JNI_OnLoad function defined, you may want to create one and have it spit out a log message just to verify that the lib is getting pulled in successfully.
You already dod...
Why do most fields (class members) in Android tutorial start with `m`?
...
This notation comes from AOSP (Android Open Source Project) Code Style Guidelines for Contributors:
Follow Field Naming Conventions
Non-public, non-static field names
start with m.
Static field names start with s.
Other fields start with a low...
Android WebView, how to handle redirects in app instead of opening a browser
... Please don't replicate the code above. Return false from the callback instead of calling view.loadUrl instead. Calling loadUrl introduces a subtle bug where if you have any iframe within the page with a custom scheme URL (say <iframe src="tel:123"/>) it will navigate your app's m...
Reference: What is variable scope, which variables are accessible from where and what are “undefined
...lues it works with originate from. It then explicitly returns a value. The caller has the confidence to know what variables the function will work with and where its return values come from:
$baz = 'baz';
$blarg = foo($baz);
Extending the scope of variables into anonymous functions
$foo = 'bar...
How to get JSON from webpage into Python script
...
Get data from the URL and then call json.loads e.g.
Python3 example:
import urllib.request, json
with urllib.request.urlopen("http://maps.googleapis.com/maps/api/geocode/json?address=google") as url:
data = json.loads(url.read().decode())
print(...
Hide Utility Class Constructor : Utility classes should not have a public or default constructor
...ic final class FilePathHelper {
private FilePathHelper() {
//not called
}
}
This prevents the default parameter-less constructor from being used elsewhere in your code. Additionally, you can make the class final, so that it can't be extended in subclasses, which is a best practice for...
Oracle JDBC ojdbc6 Jar as a Maven Dependency
... to your local repository.
Maven syntax:
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.3</version>
</dependency>
...
<repositories>
<repository>
<id>codelds</id&...