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What is the __del__ method, How to call it?
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__del__ is a finalizer. It is called when an object is garbage collected which happens at some point after all references to the object have been deleted.
In a simple case this could be right after you say del x or, if x is a local variable, after...
How do I create a self-signed certificate for code signing on Windows?
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If you're using an older version such as Windows 7, you'll need to stick with MakeCert or another solution. Some people suggest the Public Key Infrastructure Powershell (PSPKI) Module.
Original Answer
While you can create a self-signed code-signing certificate (SPC - Software Publisher Certificat...
HTML5 LocalStorage: Checking if a key exists [duplicate]
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Quoting from the specification:
The getItem(key) method must return the current value associated with the given key. If the given key does not exist in the list associated with the object then this method must return null.
You should actually check against null....
Does using final for variables in Java improve garbage collection?
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Here's a slightly different example, one with final reference-type fields rather than final value-type local variables:
public class MyClass {
public final MyOtherObject obj;
}
Every time you create an instance of MyClass, you'll be creating an outgoing refer...
How is Docker different from a virtual machine?
...to try to understand the difference between Docker and a full VM. How does it manage to provide a full filesystem, isolated networking environment, etc. without being as heavy?
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How can I force browsers to print background images in CSS?
...irectly in the page because there are several of them being used as CSS sprites.)
12 Answers
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Disable HttpClient logging
I am using commons-httpclient 3.1 in an integration test suite. The default logging for HttpClient is extremely noisy and I can't seem to turn it off. I've tried following the instructions here but none of them make any difference.
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Why can a function modify some arguments as perceived by the caller, but not others?
...n this example, why is f() able to alter the value of x , as perceived within main() , but not the value of n ?
11 Ans...
When is .then(success, fail) considered an antipattern for promises?
I had a look at the bluebird promise FAQ , in which it mentions that .then(success, fail) is an antipattern . I don't quite understand its explanation as for the try and catch.
What's wrong with this the following?
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check android application is in foreground or not? [duplicate]
I went through a lot of answers for this question.But it's all about single activity..How to check whether the whole app is running in foreground or not ?
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