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How to prove that a problem is NP complete?
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As far as I remember, there is a theorem called the Cook-Levin theorem which states that SAT is NP-complete. That proof is quite a bit more complicated than what I outlined above and I don't think I can explain it in my own words.
– Laila Agaev
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How to add spacing between UITableViewCell
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Nice solution. In case anyone has issues, I had to call super.layoutSubviews() first to ensure the entire view was properly laid out prior to setting its frame.
– ruttopia
Dec 14 '16 at 21:51
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How to get the directory of the currently running file?
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It actually works even if os.Args[0] does not contain the abs path. The reason the playground result is not what you expected is because it is inside a sandbox.
– Gustavo Niemeyer
Jul 21 '15 at...
How do I update/upsert a document in Mongoose?
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Mongoose now supports this natively with findOneAndUpdate (calls MongoDB findAndModify).
The upsert = true option creates the object if it doesn't exist. defaults to false.
var query = {'username': req.user.username};
req.newData.username = req.user.username;
MyModel.findOneAndUpd...
Standard alternative to GCC's ##__VA_ARGS__ trick?
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It is possible to avoid the use of GCC's ,##__VA_ARGS__ extension if you are willing to accept some hardcoded upper limit on the number of arguments you can pass to your variadic macro, as described in Richard Hansen's answer to this question. If you do not want to hav...
Rebase array keys after unsetting elements
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@webbiedave sorry, but that is not true. It does actually reorder my array. Very very strange.
– FooBar
Jun 23 '14 at 16:28
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How do I obtain a Query Execution Plan in SQL Server?
...an execution plan, which one to use will depend on your circumstances. Usually you can use SQL Server Management Studio to get a plan, however if for some reason you can't run your query in SQL Server Management Studio then you might find it helpful to be able to obtain a plan via SQL Server Profil...
How do I convert Word files to PDF programmatically? [closed]
I have found several open-source/freeware programs that allow you to convert .doc files to .pdf files, but they're all of the application/printer driver variety, with no SDK attached.
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.gitignore all the .DS_Store files in every folder and subfolder
...k the problem you're having is that in some earlier commit, you've accidentally added .DS_Store files to the repository. Of course, once a file is tracked in your repository, it will continue to be tracked even if it matches an entry in an applicable .gitignore file.
You have to manually remove th...
How in node to split string by newline ('\n')?
... can help you out:
var os = require('os');
a.split(os.EOL);
This is usually more useful for constructing output strings from Node though, for platform portability.
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