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How to count the number of files in a directory using Python
...fficient than using glob.glob. To test if a filename is an ordinary file (and not a directory or other entity), use os.path.isfile():
import os, os.path
# simple version for working with CWD
print len([name for name in os.listdir('.') if os.path.isfile(name)])
# path joining version for other pa...
Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.
...
Update
data.table v1.9.6+ now supports OP's original attempt and the following answer is no longer necessary.
You can use DT[order(-rank(x), y)].
x y v
1: c 1 7
2: c 3 8
3: c 6 9
4: b 1 1
5: b 3 2
6: b 6 3
7: a 1 4
8: a 3 5
9: a 6 6
...
Draw in Canvas by finger, Android
... View. You override the onDraw(). You add the path of where finger touches and moves. You override the onTouch() of this purpose. In your onDraw() you draw the paths using the paint of your choice. You should call invalidate() to refresh the view.
To choose options you can click menu and choose the...
How do I set GIT_SSL_NO_VERIFY for specific repos only?
... in the world you are using sudo at all? local repository doesn't need it, and user configuration is in $HOME (whatever that is on your system) so it doesn't need sudo either.
– mcepl
Jul 30 '15 at 8:25
...
CSS3 Rotate Animation
... notes on your code:
You've nested the keyframes inside the .image rule, and that's incorrect
float:left won't work on absolutely positioned elements
Have a look at caniuse: IE10 doesn't need the -ms- prefix
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How to subtract 30 days from the current datetime in mysql?
... * FROM table
WHERE exec_datetime 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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How to open the Google Play Store directly from my Android application?
...CTION_VIEW, Uri.parse("market://details?id=" + appPackageName)));
} catch (android.content.ActivityNotFoundException anfe) {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + appPackageName)));
}
We use a try/catch block here because an E...
ruby system command check exit code
I have a bunch of system calls in ruby such as the following and I want to check their exit codes simultaneously so that my script exits out if that command fails.
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Making the iPhone vibrate
...ort vibration, it plays a beep
sound. The second function, on the other hand, does nothing on
unsupported devices. So if you are going to vibrate the device
continuously, as an alert, common sense says, use function 2.
First, add the AudioToolbox framework AudioToolbox.framework to your targ...
Why are there two build.gradle files in an Android Studio project?
After having imported an Eclipse project into Android Studio, I see two build.gradle files:
2 Answers
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