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Get a pixel from HTML Canvas?
....getContext('2d');
// Get the CanvasPixelArray from the given coordinates and dimensions.
var imgd = context.getImageData(x, y, width, height);
var pix = imgd.data;
// Loop over each pixel and invert the color.
for (var i = 0, n = pix.length; i < n; i += 4) {
pix[i ] = 255 - pix[i ]; // r...
Is there any way to ignore INSTALL_FAILED_VERSION_DOWNGRADE on application install with the Android
It seems like the most recent Android 4.2 has introduced this error condition on installation when one attempts to install an APK with a lower version. In prior versions of Android, one would be able to install older APK's simply via adb install -r <link to APK> . For debugging purposes, I f...
Printing everything except the first field with awk
...1 = ""; print $0, first; }'
You can also find the number of columns in NF and use that in a loop.
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Binary search (bisection) in Python
Is there a library function that performs binary search on a list/tuple and return the position of the item if found and 'False' (-1, None, etc.) if not?
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How to deal with persistent storage (e.g. databases) in Docker
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Docker 1.9.0 and above
Use volume API
docker volume create --name hello
docker run -d -v hello:/container/path/for/volume container_image my_command
This means that the data-only container pattern must be abandoned in favour of the ne...
Adding gif image in an ImageView in android
...copy your GIF image into Asset Folder of your app
create following classes and paste the code
AnimationActivity: -
public class AnimationActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(saved...
Can I avoid the native fullscreen video player with HTML5 on iPhone or android?
I've built a web app that uses the HTML5 tag and JavaScript code that renders other content synchronized with the running video. It works great in desktop browsers: Firefox, Chrome, and Safari. On an iPhone or a DroidX, the native video player pops up and takes over the screen, thus obscuring the o...
Read .mat files in Python
...in Matlab. You should do that anyways as it uses a better/more supported/standardized format.
– vikrantt
May 10 '15 at 22:18
4
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Difference between JOIN and INNER JOIN
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It's ANSI SQL standard. See more: contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt; en.wikipedia.org/wiki/SQL-92
– Indian
Jan 26 '18 at 10:14
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C++: const reference, before vs after type-specifier
...le, which is redundant; when dealing with const pointers both Fred const* and Fred* const are valid but different.
It's a matter of style, but I prefer using const as a suffix since it can be applied consistently including const member functions.
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