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How to determine whether a Pandas Column contains a particular value
...lumn 43 in df['id'] it still returned True . When I subset to a data frame only containing entries matching the missing id df[df['id'] == 43] there are, obviously, no entries in it. How to I determine if a column in a Pandas data frame contains a particular value and why doesn't my current meth...
How to convert AAR to JAR
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The AAR file consists of a JAR file and some resource files (it is basically a standard zip file with a custom file extension). Here are the steps to convert:
Extract the AAR file using standard zip extract (rename it to *.zip to make it easier)
Find the classes.ja...
C-like structures in Python
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Use a named tuple, which was added to the collections module in the standard library in Python 2.6. It's also possible to use Raymond Hettinger's named tuple recipe if you need to support Python 2.4.
It's nice for your basic example...
How to amend several commits in Git to change author
... series of commits in Git and I realise now that I forgot to set my user name and user email properties correctly (new machine). I have not yet pushed these commits to my repository, so how can I correct these commits before I do so (only the 3 latest commits on the master branch)?
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How to force 'cp' to overwrite directory instead of creating another one inside?
...ered Jun 30 '14 at 8:45
Saurabh MeshramSaurabh Meshram
6,55633 gold badges1616 silver badges3131 bronze badges
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Setting up a common nuget packages folder for all solutions when some projects are included in multi
...kages are by default stored per solution, which is very frustrating when some projects with NuGet references are included in several solutions. Then the references are changed to other solutions package folder which may actually be unavailable to another developer or build machine.
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“#include” a text file in a C program as a char[]
...way to include an entire text file as a string in a C program at compile-time?
17 Answers
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How to get the instance id from within an ec2 instance?
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See the EC2 documentation on the subject.
Run:
wget -q -O - http://169.254.169.254/latest/meta-data/instance-id
If you need programatic access to the instance ID from within a script,
die() { status=$1; shift; echo "FATAL: $*"; exit $st...
urlencode vs rawurlencode?
...en/function.rawurlencode.php)
Returns a string in which all non-alphanumeric characters except -_.~ have been replaced with a percent (%) sign followed by two hex digits. This is the encoding described in » RFC 3986 for protecting literal characters from being interpreted as special URL delimit...
.prop() vs .attr()
...riginal answer applies specifically to jQuery 1.6. My advice remains the same but jQuery 1.6.1 changed things slightly: in the face of the predicted pile of broken websites, the jQuery team reverted attr() to something close to (but not exactly the same as) its old behaviour for Boolean attributes. ...