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Check whether a path is valid in Python without creating a file at the path's target
...rom this pathname is valid or
# not, ignoring non-existent and non-readable path components.
for pathname_part in pathname.split(os.path.sep):
try:
os.lstat(root_dirname + pathname_part)
# If an OS-specific exception is raised, its error code
...
Android: Clear Activity Stack
...ways use
Intent.FLAG_ACTIVITY_CLEAR_TOP
as a flag on that intent.
Read more about the flag here.
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How to make a copy of a file in android?
...[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
} finally {
out.close();
}
} finally {
in.close();
}
}
On API 19+ you can use Java Automatic Resource Ma...
Is log(n!) = Θ(n·log(n))?
...og(n - 1) + log(n) (larger half of the terms of log(n!)). Actually, I just read the question and saw that the clue is stated in the question. Basically, (n/2)^(n/2) <= n! <= n^n => log((n/2)^(n/2))<=log(n!)<=log(n^n) => Θ(n/2 * log(n/2))<=log(n!)<=Θ(n*log(n))
...
C# binary literals
...es in terms of other values in the same class, and you have a very easy-to-read declarative syntax for bit flag enums.
[Flags]
enum Days
{
None = 0,
Sunday = 1,
Monday = 1 << 1, // 2
Tuesday = 1 << 2, // 4
Wednesday = 1 << 3, // 8
...
What are the main performance differences between varchar and nvarchar SQL Server data types?
...ce is not the issue... but memory and performance will be.
Double the page reads, double index size, strange LIKE and = constant behaviour etc
Do you need to store Chinese etc script? Yes or no...
And from MS BOL "Storage and Performance Effects of Unicode"
Edit:
Recent SO question highlighting...
Android requires compiler compliance level 5.0 or 6.0. Found '1.7' instead. Please use Android Tools
... project folder and right click on it -> properties -> check off the read only box and click ok
Right-click on your project and select "Android Tools -> Fix Project Properties"
Right-click on your project and select "Properties -> Java Compiler", check "Enable project specific settings"...
How to debug .htaccess RewriteRule not working
...u have an idea of when does the .htaccess file load? I though apache would read this first
– macha
Feb 10 '12 at 20:31
...
How do 20 questions AI algorithms work?
...
I recommend reading about the game here: http://en.wikipedia.org/wiki/Twenty_Questions
In particular the Computers section:
The game suggests that the information
(as measured by Shannon's entropy
statistic) required to identif...
pandas DataFrame: replace nan values with average of columns
...
# To read data from csv file
Dataset = pd.read_csv('Data.csv')
X = Dataset.iloc[:, :-1].values
# To calculate mean use imputer class
from sklearn.impute import SimpleImputer
imputer = SimpleImputer(missing_values=np.nan, strateg...