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What's the difference between identifying and non-identifying relationships?
... fully grasp the differences. Can you describe both concepts and use real world examples?
15 Answers
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Add line break to ::after or ::before pseudo-element content
I do not have access to the HTML or PHP for a page and can only edit via CSS. I've been doing modifications on a site and adding text via the ::after or ::before pseudo-elements and have found that escape Unicode should be used for things such as a space before or after the added content.
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How can I make gdb save the command history?
How can I set up gdb so that it saves the command history? When starting a new gdb session I'd like to use the arrow up keys to access the commands of the previous sessions.
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In what order are Panels the most efficient in terms of render time and performance?
There are many times when more than one panel would suitable for the layout I want, however I know there is a difference in render times for different panel types.
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How to get file creation & modification date/times in Python?
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Getting some sort of modification date in a cross-platform way is easy - just call os.path.getmtime(path) and you'll get the Unix timestamp of when the file at path was last modified.
Getting file creation dates, on the other hand, is fid...
Is it better to specify source files with GLOB or each file individually in CMake?
CMake offers several ways to specify the source files for a target.
One is to use globbing ( documentation ), for example:
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How can I check if a command exists in a shell script? [duplicate]
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In general, that depends on your shell, but if you use bash, zsh, ksh or sh (as provided by dash), the following should work:
if ! type "$foobar_command_name" > /dev/null; then
# install foobar here
fi
For a real installation script, you'd probably want to be sure that type doesn't retu...
How to run Node.js as a background process and never die?
...nded processes. And you can kill a backgrounded process by running kill %1 or kill %2 with the number being the index of the process.
Powerful solution (allows you to reconnect to the process if it is interactive):
screen
You can then detach by pressing Ctrl+a+d and then attach back by running ...
SVN encrypted password store
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It is a client issue. It warns you that the credentials used for the different servers are being stored in plain text. You can hide that warning or use an encrypted storage to cache the passwords.
See: http://blogs.collab.net/subversion/2009/07/subversion-16-security-improvements/
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Extracting just Month and Year separately from Pandas Datetime column
...ivalDate']).year
df['month'] = pd.DatetimeIndex(df['ArrivalDate']).month
or...
df['year'] = df['ArrivalDate'].dt.year
df['month'] = df['ArrivalDate'].dt.month
Then you can combine them or work with them just as they are.
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