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C++ Redefinition Header Files (winsock2.h)
...ass.h and then I'm including MyClass.h in many files, so it includes multiple times and redefinition error occurs. How to prevent?
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Java : How to determine the correct charset encoding of a stream
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Here are my favorites:
TikaEncodingDetector
Dependency:
<dependency>
<groupId>org.apache.any23</groupId>
<artifactId>apache-any23-encoding</artifactId>
<version>1.1</version>
</dependency>
Sample:
public static Charset guessC...
How to know if user is logged in with passport.js?
... as in "router.get('/', my_controller.index)", then passport is never consulted and req.user will always be undefined. This is frustrating because I want to allow any visitor to call an API, but tailor the content of the response depending on who is requesting.
– Lawrence I. S...
“Default Activity Not Found” on Android Studio upgrade
...ght cause this problem because I don't use it.
However, that error: "Default Activity Not Found" seems to be telling you that you don't have an activity declared in AndroidManifest.xml that is marked as the main activity, to be launched when the application starts.
You should have at least one act...
M_PI works with math.h but not with cmath in Visual Studio
...am using Visual Studio 2010. I have read that in C++ it is better to use <cmath> rather than <math.h> .
7 A...
How to remove leading and trailing whitespace in a MySQL field?
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Just to be clear, TRIM by default only remove spaces (not all whitespaces). Here is the doc: http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_trim
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No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
...panel). Then, I clicked the JRE tab and selected the option Workspace default JRE
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How do I make the method return type generic?
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You could define callFriend this way:
public <T extends Animal> T callFriend(String name, Class<T> type) {
return type.cast(friends.get(name));
}
Then call it as such:
jerry.callFriend("spike", Dog.class).bark();
jerry.callFriend("quacker", Duck.class)...
How to query as GROUP BY in django?
...cts.values('designation').annotate(dcount=Count('designation'))
This results in a query similar to
SELECT designation, COUNT(designation) AS dcount
FROM members GROUP BY designation
and the output would be of the form
[{'designation': 'Salesman', 'dcount': 2},
{'designation': 'Manager', 'dco...
multi-step registration process issues in asp.net mvc (split viewmodels, single model)
I have a multi-step registration process , backed by a single object in domain layer , which have validation rules defined on properties.
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