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How do I use floating-point division in bash?
... 1/3 | node -p
octave
echo 1/3 | octave
perl
echo print 1/3 | perl
python2
echo print 1/3. | python2
python3
echo 'print(1/3)' | python3
R
echo 1/3 | R --no-save
with cleaned up output:
echo 1/3 | R --vanilla --quiet | sed -n '2s/.* //p'
ruby
echo print 1/3.0 | ruby
wcalc
ech...
NuGet behind a proxy
...
xml <system.net> <defaultProxy useDefaultCredentials="true" enabled="true"> </defaultProxy> <settings> <ipv6 enabled="true"/> </settings> </system.net...
Quick way to list all files in Amazon S3 bucket?
...
I'd recommend using boto. Then it's a quick couple of lines of python:
from boto.s3.connection import S3Connection
conn = S3Connection('access-key','secret-access-key')
bucket = conn.get_bucket('bucket')
for key in bucket.list():
print key.name.encode('utf-8')
Save this as list.p...
Using global variables between files?
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See Python's document on sharing global variables across modules:
The canonical way to share information across modules within a single program is to create a special module (often called config or cfg).
config.py:
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Count how many records are in a CSV Python?
I'm using python (Django Framework) to read a CSV file. I pull just 2 lines out of this CSV as you can see. What I have been trying to do is store in a variable the total number of rows the CSV also.
...
Embed SVG in SVG?
... width="100%" height="100%" viewBox="-100 -100 200 200" version="1.1"
xmlns="http://www.w3.org/2000/svg">
<circle cx="-50" cy="-50" r="30" style="fill:red" />
<image x="10" y="20" width="80" height="80" href="recursion.svg" />
</svg>
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Running a specific test case in Django when your app has a tests directory
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Checkout django-nose. It allows you to specify tests to run like:
python manage.py test another.test:TestCase.test_method
or as noted in comments, use the syntax:
python manage.py test another.test.TestCase.test_method
...
Titlecasing a string with exceptions
Is there a standard way in Python to titlecase a string (i.e. words start with uppercase characters, all remaining cased characters have lowercase) but leaving articles like and , in , and of lowercased?
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Determining Whether a Directory is Writeable
What would be the best way in Python to determine whether a directory is writeable for the user executing the script? Since this will likely involve using the os module I should mention I'm running it under a *nix environment.
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javac option to compile all java files under a given directory recursively
...hat was designed to build software.
Using Ant
If you create a simple build.xml file that describes how to build the software:
<project default="compile">
<target name="compile">
<mkdir dir="bin"/>
<javac srcdir="src" destdir="bin"/>
</target>
<...