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Difference between virtual and abstract methods [duplicate]
...bclasses CAN override the method using the override modifier and provide a custom implementation.
public abstract class E
{
public abstract void AbstractMethod(int i);
public virtual void VirtualMethod(int i)
{
// Default implementation which can be overridden by subclasses.
...
How do I uniquely identify computers visiting my web site?
...es the SessionID that was deleted.
Validation
Suppose Haxor X steals our customers cookies while they are still logged in. How do we protect them? Cryptography and Browser fingerprinting to the rescue. Remember our original definition for SessionID was:
BrowserID|ComputerID|randomBytes(256)
We ...
How to set a Fragment tag by code?
... ago but if anyone is facing the same problem do like I've done:
Create a custom Fragment Class with a tag field:
public class MyFragment extends Fragment {
private String _myTag;
public void setMyTag(String value)
{
if("".equals(value))
return;
_myTag = value;
}
//other code goes ...
What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?
...Vector -- instead, this is where Repa steps in, making it very easy to use custom data types stored in an efficient manner, thanks to the shape indexing.
In Repa, your triple of shorts would have the type:
Array DIM3 Word16
That is, a 3D array of Word16s.
For bitonal images I will need to store...
virtualenvwrapper and Python 3
...
You can make virtualenvwrapper use a custom Python binary instead of the one virtualenvwrapper is run with. To do that you need to use VIRTUALENV_PYTHON variable which is utilized by virtualenv:
$ export VIRTUALENV_PYTHON=/usr/bin/python3
$ mkvirtualenv -a mypr...
How to get just the responsive grid from Bootstrap 3?
...
Go to http://getbootstrap.com/customize/ and toggle just what you want from the BS3 framework and then click "Compile and Download" and you'll get the CSS and JS that you chose.
Open up the CSS and remove all but the grid. They include some normalize s...
Crop MP3 to first 30 seconds
...hich is 64 kb/s in the version I have here at least). This might give your customers a false impression of the quality of your sound files, and it also takes longer to do.
Here's a command line that will slice to 30 seconds without transcoding:
ffmpeg -t 30 -i inputfile.mp3 -acodec copy outputfile...
Multiplication on command line terminal
...p "5*5"
25
pythonp "1 / (1+math.exp(0.5))"
0.3775406687981454
# define a custom function and pass it to another higher-order function
pythonp "n=10;functools.reduce(lambda x,y:x*y, range(1,n+1))"
3628800
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How to print to the console in Android Studio?
...Make sure to set your filter to Show only selected application or create a custom filter.
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Get first and last day of month using threeten, LocalDate
...
You can try this to avoid indicating custom date and if there is need to display start and end dates of current month:
LocalDate start = LocalDate.now().minusDays(LocalDate.now().getDayOfMonth()-1);
LocalDate end = LocalDate.now().minusDays(LocalDate.no...