大约有 25,300 项符合查询结果（耗时：0.0328秒） [XML]
Using sed and grep/egrep to search and replace
...ng lines using extended regular expressions
-l: only list matching filenames
-R: search recursively through all given directories
-Z: use \0 as record separator
"\.jpg|\.png|\.gif": match one of the strings ".jpg", ".gif" or ".png"
.: start the search in the current directory
xargs: execute a com...
Fastest way to count exact number of rows in a very large table?
I have come across articles that state that SELECT COUNT(*) FROM TABLE_NAME will be slow when the table has lots of rows and lots of columns.
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Peak signal detection in realtime timeseries data
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Robust peak detection algorithm (using z-scores)
I came up with an algorithm that works very well for these types of datasets. It is based on the principle of dispersion: if a new datapoint is a given x number of standard deviations away from some moving mean, the algorithm sig...
Taking screenshot on Emulator from Android Studio
... as a result I can't take screenshots using the emulator. Could you give some tips to get it sorted out?
– agiro
Dec 25 '17 at 13:18
1
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Building executable jar with maven?
I am trying to generate an executable jar for a small home project called "logmanager" using maven, just like this:
4 Answe...
Round to 5 (or other number) in Python
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I don't know of a standard function in Python, but this works for me:
Python 2
def myround(x, base=5):
return int(base * round(float(x)/base))
Python3
def myround(x, base=5):
return base * round(x/base)
It is easy to see why the above works. You want to make sure that your n...
Apache: client denied by server configuration
...ecurity feature that often results in this error. You would also see a log message of the form "client denied by server configuration". The feature is requiring an authorized user identity to access a directory. It is turned on by DEFAULT in the httpd.conf that ships with Apache. You can see the ena...
Git push error: Unable to unlink old (Permission denied)
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Changing dir permissions did work for me (thanks!) but it's odd because I could manually overwrite the files in question via sftp without any trouble. Strange that when git tried to do same it couldn't.
– Jonathan Stark
Jul ...
How to delete the last n commits on Github and locally?
...EAD~4. Though, things might get a bit complicated if your history contains merges. You can find more information about specifying revisions in corresponding section here.
– KL-7
Apr 29 '14 at 20:23
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How to resize the jQuery DatePicker control
I'm using the jQuery DatePicker control for the first time. I've got it working on my form, but it's about twice as big as I would like, and about 1.5 times as big as the demo on the jQuery UI page. Is there some simple setting I'm missing to control the size?
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