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qmake: could not find a Qt installation of ''
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sudo apt-get install qt5-default works for me.
$ aptitude show qt5-default
tells that
This package sets Qt 5 to be the default Qt version to be used when using
development binaries like qmake. It provides a default configuration for
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Is there a way to change the environment variables of another process in Unix?
...t one process can change another's environment variables (assuming they're all being run by the same user)? A general solution would be best, but if not, what about the specific case where one is a child of the other?
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How do I load an org.w3c.dom.Document from XML in a string?
...L document in a string and would like a Document object. Google turns up all sorts of garbage. What is the simplest solution? (In Java 1.5)
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“Conversion to Dalvik format failed with error 1” on external JAR
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Go to Project » Properties » Java Build Path » Libraries and remove all except the "Android X.Y" (in my case Android 1.5). click OK. Go to Project » Clean » Clean projects selected below » select your project and click OK. That should work.
It is also possible that you have a JAR file loc...
What is the equivalent of Java's final in C#?
...le difference between the two languages here is that Java by default marks all non-static methods as virtual, whereas C# marks them as sealed. Hence, you only need to use the sealed keyword in C# if you want to stop further overriding of a method that has been explicitly marked virtual in the base c...
Cross compile Go on OSX?
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The env command runs only that call in a custom environment and 'resets' it after it is done. For example run export GOOS=windows, then the command with or without the env and echo $GOOS afterwards. With the env the GOOS was not changed.
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How to print matched regex pattern using awk?
...search for pattern using //, then print out the line, which by default is called a record, denoted by $0. At least read up the documentation.
If you only want to get print out the matched word.
awk '{for(i=1;i<=NF;i++){ if($i=="yyy"){print $i} } }' file
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Querying data by joining two tables in two database on different servers
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You'll need to use sp_addlinkedserver to create a server link. See the reference documentation for usage. Once the server link is established, you'll construct the query as normal, just prefixing the database name with the other server. I.E:
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Detect permission of camera in iOS
...se if(authStatus == AVAuthorizationStatusRestricted){
// restricted, normally won't happen
} else if(authStatus == AVAuthorizationStatusNotDetermined){
// not determined?!
[AVCaptureDevice requestAccessForMediaType:mediaType completionHandler:^(BOOL granted) {
if(granted){
NSLog(@"Gr...
What is CDATA in HTML? [duplicate]
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All text in an XML document will be parsed by the parser.
But text inside a CDATA section will be ignored by the parser.
CDATA - (Unparsed) Character Data
The term CDATA is used about text data that should not be parsed by t...