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How to subtract 30 days from the current datetime in mysql?
...ime BETWEEN DATE_SUB(NOW(), INTERVAL 30 DAY) AND NOW();
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-add
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“for line in…” results in UnicodeDecodeError: 'utf-8' codec can't decode byte
...rb').read())['encoding']. Check out this answer for details: stackoverflow.com/a/3323810/615422
– VertigoRay
Mar 20 '19 at 13:34
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RelativeLayout is taking fullscreen for wrap_content
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edited Jun 20 at 9:12
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answered Jun 26 '11 at 20:15
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Check if instance is of a type
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With C# 7 you can combine is and as with pattern matching: if (x is TForm tf) {…
– Richard
Nov 24 '17 at 11:19
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Center image in div horizontally [duplicate]
...sted here assumes that you know the dimensions of your img, which is not a common scenario. Also, planting the dimensions into the solution is painful.
Simply set:
/* for the img inside your div */
display: block;
margin-left: auto;
margin-right: auto;
or
/* for the img inside your div */
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Check if an apt-get package is installed and then install it if it's not on Linux
...s, too.
dpkg-query -l <packagename>
To find what package owns the command, try:
dpkg -S `which <command>`
For further details, see article Find out if package is installed in Linux and dpkg cheat sheet.
sha...
how does multiplication differ for NumPy Matrix vs Array classes?
The numpy docs recommend using array instead of matrix for working with matrices. However, unlike octave (which I was using till recently), * doesn't perform matrix multiplication, you need to use the function matrixmultipy(). I feel this makes the code very unreadable.
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npm install vs. update - what's the difference?
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Clone only one branch [duplicate]
...anch, for example:
git clone -b mybranch --single-branch git://sub.domain.com/repo.git
Note: Also you can add another single branch or "undo" this action.
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How to include (source) R script in other scripts
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