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NameError: name 'self' is not defined

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PostgreSQL - Rename database

I need to rename the database but when I do in PGAdmin : ALTER DATABASE "databaseName" RENAME TO "databaseNameOld" it told me that it cannot. ...
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Remove all special characters except space from a string using JavaScript

I want to remove all special characters except space from a string using JavaScript. 11 Answers ...
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Why does 1==1==1 return true, “1”==“1”==“1” return true, and “a...

I tested the above code in Chrome's console and for some reason, a() returns true, b() returns true, and c() returns false. ...
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How can I hash a password in Java?

I need to hash passwords for storage in a database. How can I do this in Java? 13 Answers ...
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Generate a heatmap in MatPlotLib using a scatter data set

I have a set of X,Y data points (about 10k) that are easy to plot as a scatter plot but that I would like to represent as a heatmap. ...
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Why do I want to avoid non-default constructors in fragments?

I am creating an app with Fragments and in one of them, I created a non-default constructor and got this warning: 6 Answe...
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Xcode Product -> Archive disabled

I have been archiving for ad hoc distribution fine for many months and suddenly today I cannot do so as the Archive menu item is disabled. I have not changed anything. I went through the provisioning setup for the project and it looks ok. ...
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WebSocket with SSL

Is it possible to have WebSockets with HTTPS? 4 Answers 4 ...
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Symbolic link to a hook in git

I wrote my own custom post-merge hook, now I added a "hooks" directory to my main project folder (since git doesn't track changes in .git/hooks), somewhere I read that I can make a symbolic link from hooks to .git/hooks so I don't have to copy the file from one folder to the other every time someone...