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When do items in HTML5 local storage expire?
...mpletely up to the user.
https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage
Of course, it's possible that something your application stores on the client may not be there later. The user can explicitly get rid of local storage, or the browser may run into space considerations. I...
How to convert R Markdown to PDF?
...he entire haskell-platform˙to build from the sources), but really easy on Windows/Mac with only a few megabytes of download.
If you have the brewed/knitted markdown file you can just call pandoc in e.g bash or with the system function within R. A POC demo of that latter is implemented in the Ṗan...
Should I return EXIT_SUCCESS or 0 from main()?
...e.g. OpenGL [glGetError()], zlib [deflate()/inflate()/...], SDL [SDL_CreateWindowAndRenderer()/...], and more).
– Tim Čas
Oct 2 '17 at 19:59
...
right click context menu for datagridview
...olumnIndex != -1 && e.RowIndex != -1 && e.Button == System.Windows.Forms.MouseButtons.Right)
{
DataGridViewCell c = (sender as DataGridView)[e.ColumnIndex, e.RowIndex];
if (!c.Selected)
{
c.DataGridView.ClearSelection();
c.DataGridV...
What does void* mean and how to use it?
...
The disadvantage of using void * is that you throw type safety out the window and into oncoming traffic. There's nothing to protect you from using the wrong comparison routine:
qsort(dArr, sizeof dArr/sizeof dArr[0], sizeof dArr[0], compareInt);
compareInt is expecting its arguments to be po...
Convert HTML + CSS to PDF [closed]
... WARNING! If you use wkhtmltopdf (at least on my system, XAMPP on Windows 7 64-bit), in all cases I tried, .gif images fail to appear in the PDF file. I tried a number of workarounds suggested in various places, such as including "width" and "height", and writing the URI's according to dif...
Wait one second in running program
...UI locks.
public void wait(int milliseconds)
{
var timer1 = new System.Windows.Forms.Timer();
if (milliseconds == 0 || milliseconds < 0) return;
// Console.WriteLine("start wait timer");
timer1.Interval = milliseconds;
timer1.Enabled = true;
timer1.Start();
timer1.T...
git add, commit and push commands in one?
...
On Windows, I needed to escape the double quotes around $1 to get it to work from PowerShell (using ... \"$1\" ...)
– DReimer
Mar 26 at 18:50
...
How can I recover the return value of a function passed to multiprocessing.Process?
...
p.join()
print(queue.get()) # Prints {"foo": True}
Note that in Windows or Jupyter Notebook, with multithreading you have to save this as a file and execute the file. If you do it in a command prompt you will see an error like this:
AttributeError: Can't get attribute 'worker' on <mod...
Random string generation with upper case letters and digits
... of just random uses /dev/urandom on *nix machines and CryptGenRandom() in Windows. These are cryptographically secure PRNGs. Using random.choice instead of random.SystemRandom().choice in an application that requires a secure PRNG could be potentially devastating, and given the popularity of this ...