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Adding 'serial' to existing column in Postgres
I have a small table (~30 rows) in my Postgres 9.0 database with an integer ID field (the primary key) which currently contains unique sequential integers starting at 1, but which was not created using the 'serial' keyword.
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Foreign keys in mongo?
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You may be interested in using a ORM like Mongoid or MongoMapper.
http://mongoid.org/docs/relations/referenced/1-n.html
In a NoSQL database like MongoDB there are not 'tables' but collections. Documents are grouped inside Colle...
Save Screen (program) output to a file
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There is a command line option for logging. The output is saved to screenlog.n file, where n is a number of the screen.
From man pages of screen:
‘-L’ Tell screen to turn on automatic output logging for the windows.
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When do I need to use a semicolon vs a slash in Oracle SQL?
We have been having some debate this week at my company as to how we should write our SQL scripts.
6 Answers
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Skip a submodule during a Maven build
We have a need to be able to skip a submodule in certain environments.
5 Answers
5
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Converting newline formatting from Mac to Windows
I need a conversion utility/script that will convert a .sql dump file generated on Mac to one readable on Windows. This is a continuation of a problem I had here . The issue seems to be with newline formatting in text files, but I can't find a tool to make the conversion...
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Disable a method in a ViewSet, django-rest-framework
ViewSets have automatic methods to list, retrieve, create, update, delete, ...
7 Answers
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Python - write() versus writelines() and concatenated strings
So I'm learning Python. I am going through the lessons and ran into a problem where I had to condense a great many target.write() into a single write() , while having a "\n" between each user input variable(the object of write() ).
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What's the difference between an exclusive lock and a shared lock?
...logy:
Think of a lockable object as a blackboard (lockable) in a class room containing a teacher (writer) and many students (readers).
While a teacher is writing something (exclusive lock) on the board:
Nobody can read it, because it's still being written, and she's blocking your view => If a...
What is the difference between encode/decode?
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The decode method of unicode strings really doesn't have any applications at all (unless you have some non-text data in a unicode string for some reason -- see below). It is mainly there for historical reasons, i think. In Python 3 it i...