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Deleting folders in python recursively
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The default behavior of os.walk() is to walk from root to leaf. Set topdown=False in os.walk() to walk from leaf to root.
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What's the difference between Perl's backticks, system, and exec?
...se unlike system and execit is an operator.
Other ways
What is missing from the above is a way to execute a command asynchronously.
That means your perl script and your command run simultaneously.
This can be accomplished with open.
It allows you to read STDOUT/STDERR and write to STDIN of your ...
Android error: Failed to install *.apk on device *: timeout
I'm getting this error from time to time and don't know what causing this:
When trying to run/debug an Android app on a real device (Galaxy Samsung S in my case) I'm getting the following error in the Console:
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GetHashCode Guidelines in C#
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@JS Bangs - From MSDN: Derived classes that override GetHashCode must also override Equals to guarantee that two objects considered equal have the same hash code; otherwise, the Hashtable type might not work correctly.
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how to set desired language in git-gui?
...set LANG=en
Please note that this will only work when launching commands from the git shell - GIT GUI launched from the start menu will not be affected
2) Delete or rename relevant *.msg file in C:\Program Files\Git\share\git-gui\lib\msgs
You save on not modifying any setup shell (especially if ...
UICollectionView's cellForItemAtIndexPath is not being called
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In my case, it was because my layout class incorrectly subclassed from UICollectionViewLayout instead of UICollectionViewFlowLayout
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Why is Java Vector (and Stack) class considered obsolete or deprecated?
...ch difference between ArrayList and Vector, but you should use ArrayList.
From the API doc.
As of the Java 2 platform v1.2, this
class was retrofitted to implement the
List interface, making it a member of
the Java Collections Framework. Unlike
the new collection implementations,
Vect...
Saving a Numpy array as an image
...An answer using PIL (just in case it's useful).
given a numpy array "A":
from PIL import Image
im = Image.fromarray(A)
im.save("your_file.jpeg")
you can replace "jpeg" with almost any format you want. More details about the formats here
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Asynctask vs Thread in android
...more elucidating because it tackles reasons why not to use simple Threads. From the top of my mind, anything that needs to be tied to Activity/Service lifecycle should use AsyncTask instead, even though you need to manually "gracefully degrade" resources inside the task, at least you don't end up wi...
Difference between size_t and unsigned int?
...but that's permitted).
The purpose of size_t is to relieve the programmer from having to worry about which of the predefined types is used to represent sizes.
Code that assumes sizeof yields an unsigned int would not be portable. Code that assumes it yields a size_t is more likely to be portable.
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