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Which version of PostgreSQL am I running?
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Highly IrregularHighly Irregular
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Reading/parsing Excel (xls) files with Python
... is a real PITA. The number of caveats is huge and the documentation is lacking and annoying. I ran into many weird bugs and gotchas, some of which took many hours to figure out.
UPDATE: For newer .xlsx files, the recommended library for reading and writing appears to be openpyxl (thanks, Ikar Poho...
Vagrant's port forwarding not working [closed]
...mall problem at the end of the Getting Started guide for vagrant . I'm working on a CentOS basebox that has Apache2 running (provisioning via Puppet). I've set up port forwarding for web requests using the following line in Vagrantfile :
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How to add an object to an array
...ed Jun 6 '11 at 15:09
John StricklerJohn Strickler
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How to source virtualenv activate in a Bash script
...oad it into that shell which exits when your script finishes and you're back to your original, unactivated shell.
Your best option would be to do it in a function
activate () {
. ../.env/bin/activate
}
or an alias
alias activate=". ../.env/bin/activate"
Hope this helps.
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AngularJS Folder Structure [closed]
...n here you can start to see it gets more difficult to find what you are looking for. When I want to find a specific view and its controller, they are in different folders. It can be good to start here if you are not sure how else to organize the code as it is quite easy to shift to the technique on ...
How do I create a parameterized SQL query? Why Should I?
..." is using parameterized SQL queries to protect against SQL injection attacks without having to vailidate every piece of user input.
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How to rollback a specific migration?
I have the following migration file db\migrate\20100905201547_create_blocks.rb
14 Answers
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What does mvn install in maven exactly do
...ol provided by Apache which does more than dependency management. We can make it as a peer of Ant and Makefile which downloads all of the dependencies required.
On a mvn install, it frames a dependency tree based on the project configuration pom.xml on all the sub projects under the super pom.xml (...
How to remove all line breaks from a string
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This is probably a FAQ. Anyhow, line breaks (better: newlines) can be one of Carriage Return (CR, \r, on older Macs), Line Feed (LF, \n, on Unices incl. Linux) or CR followed by LF (\r\n, on WinDOS). (Contrary to another answer, this has nothing to do with character...