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Does “\d” in regex mean a digit?
I found that in 123 , \d matches 1 and 3 but not 2 . I was wondering if \d matches a digit satisfying what kind of requirement? I am talking about Python style regex.
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How to change string into QString?
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161
If by string you mean std::string you can do it with this method:
QString QString::fromStdStr...
What is the purpose of setting a key in data.table?
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127
Minor update: Please refer to the new HTML vignettes as well. This issue highlights the other ...
How to make connection to Postgres via Node.js
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313
Here is an example I used to connect node.js to my Postgres database.
The interface in node.js...
close vs shutdown socket?
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196
This is explained in Beej's networking guide. shutdown is a flexible way to block communicati...
CSS: Set a background color which is 50% of the width of the window
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How to convert Set to String[]?
...) method taking a typed array argument of the same size.
String[] GPXFILES1 = myset.toArray(new String[myset.size()]);
A different size can also be used, but that would force the toArray() method to create a new array to return instead of reusing the provided argument, which may end up to be less...
Why and How to avoid Event Handler memory leaks?
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191
The cause is simple to explain: while an event handler is subscribed, the publisher of the eve...