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How to prevent custom views from losing state across screen orientation changes
...implementing View#onSaveInstanceState and View#onRestoreInstanceState and extending the View.BaseSavedState class.
public class CustomView extends View {
private int stateToSave;
...
@Override
public Parcelable onSaveInstanceState() {
//begin boilerplate code that allows parent class...
How does MongoDB sort records when no sort order is specified?
...atural order) is an undefined implementation detail. Maintaining order is extra overhead for storage engines and MongoDB's API does not mandate predictability outside of an explicit sort() or the special case of fixed-sized capped collections which have associated usage restrictions. For typical wor...
How can I extract a good quality JPEG image from a video file with ffmpeg?
Currently I am using this command to extract the images:
2 Answers
2
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NSOperation vs Grand Central Dispatch
...very simply with NSOperationQueue that take a lot of work with pure GCD. (Examples: bandwidth-constrained queues that only run N operations at a time; establishing dependencies between operations. Both very simple with NSOperation, very difficult with GCD.) Apple's done the hard work of leveraging ...
Extract substring using regexp in plain bash
I'm trying to extract the time from a string using bash, and I'm having a hard time figuring it out.
4 Answers
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Best way to define private methods for a class in Objective-C
...ethod in Objective-C. However, starting in Objective-C 2.0 (meaning Mac OS X Leopard, iPhone OS 2.0, and later) you can create a category with an empty name (i.e. @interface MyClass ()) called Class Extension. What's unique about a class extension is that the method implementations must go in the sa...
How do you get the list of targets in a makefile?
...ve on @nobar's great approach as follows:
uses a more robust command to extract the target names, which hopefully prevents any false positives (and also does away with the unnecessary sh -c)
does not invariably target the makefile in the current directory; respects makefiles explicitly specified w...
How to change the color of an svg element?
...ay: none;
}
.no-svg .my-svg-alternate {
display: block;
width: 100px;
height: 100px;
background-image: url(image.png);
}
<svg width="96px" height="96px" viewBox="0 0 512 512" enable-background="new 0 0 512 512" xml:space="preserve">
<path id="time-3-icon" d="M256,50C142.229...
How do I edit an existing tag message in git?
...
To update a complex message, just specify the annotated tag option with -a or the signed tag option with -s:
git tag <tag name> <tag name>^{} -f -a
This will open an editor with the contents of your old tag message.
...
Do we still need end slashes in HTML5?
In HTML5, do we still need the end slash like in XHTML?
5 Answers
5
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