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What does “error: option --single-version-externally-managed not recognized” indicate?
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I was having this problem. It turned out it was a problem with the file permissions on my pip cache.
If you see a message at the very beginning of your pip output like
The directory '/home/ubuntu/.cache/pip/http' or its parent directory is not owned by the current user and the cache has be...
'id' is a bad variable name in Python
...because it's obvious from context what you're doing:
Example:
def numbered(filename):
with open(filename) as file:
for i, input in enumerate(file):
print("%s:\t%s" % (i, input), end='')
Some built-ins with tempting names:
id
file
list, dict
map
all, any
complex, int
dir
inp...
JBoss vs Tomcat again [closed]
...d security, e.g. out-of-the-box integration with 3rd party directories
EAR file instead of "only" WAR file support
all the other "great" Java EE features I can't remember :-)
In my opinion Tomcat is a very good fit if it comes to web centric, user facing applications. If backend integration comes ...
Best way to simulate “group by” from bash?
Suppose you have a file that contains IP addresses, one address in each line:
14 Answers
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Eclipse - java.lang.ClassNotFoundException
...st one more advice, if your web project's tests require some configuration files that are under the resources, be sure to include that folder as a source folder and to make the proper build-path configuration.
Hope it helps.
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Map a network drive to be used by a service
... task, insert "system" in the "run as" field and point the task to a batch file with the simple command
net use z: \servername\sharedfolder /persistent:yes
Then select "run at system startup" (or similar, I do not have an English version) and you are done.
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CSS: Control space between bullet and
...ing pixels, ems or %
Disadvantages:
Adds an extra (albeit small) image file to your page, increasing the page weight
If a user increases the text size on their browser, the bullet will stay at the original size. It'll also likely get further out of position as the text size increases
If you're d...
Is there a way to check if WPF is currently executing in design mode or not?
...ata, IsDesignTimeCreatable=True}"
or by specifying sample data in a XAML file:
d:DataContext="{d:DesignData Source=../DesignData/SamplePage.xaml}">
You have to set the SamplePage.xaml file properties to:
BuildAction: DesignData
Copy to Output Directory: Do not copy
Custom To...
How and/or why is merging in Git better than in SVN?
...esets or store any tracking information -- it just stores the state of the files at each commit and uses heuristics to locate renames and code movements as required (the on-disk storage is more complicated than this, but the interface it presents to the logic layer exposes no tracking).
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Creating and throwing new exception
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To call a specific exception such as FileNotFoundException use this format
if (-not (Test-Path $file))
{
throw [System.IO.FileNotFoundException] "$file not found."
}
To throw a general exception use the throw command followed by a string.
throw "Error t...