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Why use #ifndef CLASS_H and #define CLASS_H in .h file but not in .cpp?
...ice, so if there are definitions within that file, you will get a compiler error telling you that you redefined a variable. When the file is processed by the preprocessor step in the compilation process, the first time its contents are reached the first two lines will check if FILE_H has been defin...
Print PHP Call Stack
...
To log the trace
$e = new Exception;
error_log(var_export($e->getTraceAsString(), true));
Thanks @Tobiasz
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How to show a GUI message box from a bash script in linux?
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I use this method to display warnings or errors within my .xinitrc while starting my xorg server. Otherwise the errors would be transparent. I also prefer this zenityover kdialog since KDE didn't start yet and GTK libs are more lightweight.
–...
How to allow download of .json file with ASP.NET
...ut the IISExpress applicationConfig already had CSV). Therefore I got this error anytime I tried to access any staticfile: Cannot add duplicate collection entry of type 'mimeMap' with unique key attribute 'fileExtension' set to '.csv' Once I removed the duplicate, no problem.
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Why should I use the keyword “final” on a method parameter in Java?
...d String.
}
Mark the local variable as final. This results in a compiler error.
void doSomething( String arg ) {
final String x = arg; // Mark variable as 'final'.
x = "elephant"; // Compiler error: The final local variable x cannot be assigned.
arg = "giraffe";
}
Instead, let’s ma...
Why is access to the path denied?
...eadonly (since you do actually have access to the path!) In my opinion the error message should be changed. Thanks for the hint anyways!
– MBoros
Feb 19 '14 at 13:57
1
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Swift: Testing optionals for nil
... : NSString?
if xyz {
// Do something using `xyz`.
}
This produces an error:
does not conform to protocol 'BooleanType.Protocol'
You have to use one of these forms:
if xyz != nil {
// Do something using `xyz`.
}
if let xy = xyz {
// Do something using `xy`.
}
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Comparison between Corona, Phonegap, Titanium
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Since this is not mentioned somewhere you basicly need to do trial and error programming on first one platform, then on the other platform. By trial and error I mean it will take about two days to get such a simple App as Animap working on the other platform. You will also need to have if (andro...
Format a date using the new date time API
I was playing with the new date time API but when running this:
3 Answers
3
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PostgreSQL “DESCRIBE TABLE”
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Error: "did not find any relation named". This means you need to wrap your table's name in double quotes. Apparently, postgres will lower case your table name without them and therefore not find your table. Hope this helps a...