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Linux delete file with size 0 [duplicate]
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This will delete all the files in a directory (and below) that are size zero.
find /tmp -size 0 -print -delete
If you just want a particular file;
if [ ! -s /tmp/foo ] ; then
rm /tmp/foo
fi
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How do I add a placeholder on a CharField in Django?
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This was the easiest method for me - and it was nice that all the other attributes (i.e. required) were still automatically added without me having to specify them.
– JxAxMxIxN
Jun 25 '17 at 17:17
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How can I delete Docker's images?
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In order to delete all images, use the given command
docker rmi $(docker images -q)
In order to delete all containers, use the given command
docker rm $(docker ps -a -q)
Warning: This will destroy all your images and containers. It will not be possible to restore them...
How to show loading spinner in jQuery?
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ajaxStart and ajaxStop are jQuery events so you can namespace them: stackoverflow.com/questions/1191485/… docs.jquery.com/Namespaced_Events
– David Xia
Apr 16 '11 at 22:57
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Best way to repeat a character in C#
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string.Concat(Enumerable.Repeat("ab", 2));
Returns
"abab"
And
string.Concat(Enumerable.Repeat("a", 2));
Returns
"aa"
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Is there a built-in function to repeat string or char in .net?
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Regular Expressions and negating a whole character group [duplicate]
...ples I gave won't match 'ab' it's true but they also won't match 'a' alone and I need them to. Is there some simple way to do this?
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Is there a simple way to remove multiple spaces in a string?
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This solution only handles single space characters. It wouldn't replace a tab or other whitespace characters handled by \s like in nsr81's solution.
– Taylor Leese
Oct 9 '09 at 22:21
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Best timestamp format for CSV/Excel?
...ile. I need to write timestamps that are accurate at least to the second, and preferably to the millisecond. What's the best format for timestamps in a CSV file such that they can be parsed accurately and unambiguously by Excel with minimal user intervention?
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What is the quickest way to HTTP GET in Python?
...en("http://example.com/foo/bar").read()
Documentation for urllib.request and read.
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Playing .mp3 and .wav in Java?
How can I play an .mp3 and a .wav file in my Java application? I am using Swing. I tried looking on the internet, for something like this example:
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