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How to open a web server port on EC2 instance
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30
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Read a zipped file as a pandas DataFrame
...('filename.zip')
Or the long form:
df = pd.read_csv('filename.zip', compression='zip', header=0, sep=',', quotechar='"')
Description of the compression argument from the docs:
compression : {‘infer’, ‘gzip’, ‘bz2’, ‘zip’, ‘xz’, None}, default ‘infer’
For on-the...
How do I change column default value in PostgreSQL?
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82
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Exception NoClassDefFoundError for CacheProvider
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11
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How to merge YAML arrays?
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If the aim is to run a sequence of shell commands, you may be able to achieve this as follows:
# note: no dash before commands
some_stuff: &some_stuff |-
a
b
c
combined_stuff:
- *some_stuff
- d
- e
- f
This is equivalent to:
some_stuff: ...
How to have no pagebreak after \include in LaTeX
...er each subsection because my subsections are in separate files. I use the command \include{file} which adds a pagebreak after the use of it.
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What is the AppDelegate for and how do I know when to use it?
...AppDelegate* del = [AppDelegate sharedAppDelegate]; (see developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/…) what does that mean? i can see examples of using it but i don't really understand the theory behind it (see this example:developer.apple.com/library/ios/#samplecode/…)
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How to empty/destroy a session in rails?
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46
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regex to match a single character that is anything but a space
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123
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wkhtmltopdf: cannot connect to X server
...eck to see if it works: run
/usr/local/bin/wkhtmltopdf http://www.google.com test.pdf
If it works, then you are done. If you get the error "Cannot connect to X server" then continue to number 7.
We need to run it headless on a 'virtual' x server. We will do this with a package called xvfb.
sud...