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Why can't I have abstract static methods in C#?
... can make a variable referring to a type and not an object, you would have more use for virtual and thus abstract static methods (and also constructors), but they aren't available and thus static calls are non-virtual in .NET.
I realize that the IL designers could allow the code to be compiled to c...
What's the role of GetHashCode in the IEqualityComparer in .NET?
...y cool data structure that trades a higher memory footprint in return for (more or less) constant costs for Add/Remove/Get operations. It is a poor choice for iterating over though. Internally, a dictionary contains an array of buckets, where values can be stored. When you add a Key and Value to a d...
Update statement with inner join on Oracle
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Where do “pure virtual function call” crashes come from?
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How to redirect output to a file and stdout
...t is also directed to the given output file as of the tee command.
Furthermore, if you want to append to the log file, use tee -a as:
program [arguments...] 2>&1 | tee -a outfile
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Change application's starting activity
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Yes, you use the AndroidManifest.xml file. You can actually even have more than one launcher activity specified in your application manifest. To make an activity seen on the launcher you add these attributes to your activity in the manifest:
<intent-filter>
<action android:name="a...
How to debug a Flask app
... Flask? Print to the console? Flash messages to the page? Or is there a more powerful option available to figure out what's happening when something goes wrong?
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Invalidating JSON Web Tokens
...r - which appears to be in line with #3. My own gut (perhaps because it is more traditional) is just to have the token (or a hash of it) act as a key into white-listed session database (similar to #2)
– funseiki
Apr 18 '14 at 19:03
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Ruby: extend self
... to make instance methods into class methods. But you can also use it as a more efficient singleton.
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