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What version of javac built my jar?
...7. The version information is built in.
http://en.wikipedia.org/wiki/Java_class_file
Note: As mentioned in the comment below,
those bytes tell you what version the class has been compiled FOR, not
what version compiled it.
...
Easily measure elapsed time
...
//***C++11 Style:***
#include <chrono>
std::chrono::steady_clock::time_point begin = std::chrono::steady_clock::now();
std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
std::cout << "Time difference = " << std::chrono::duration_cast<std::c...
FFMPEG (libx264) “height not divisible by 2”
... is:
-vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"
Command:
ffmpeg -r 24 -i frame_%05d.jpg -vcodec libx264 -y -an video.mp4 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"
Basically, .h264 needs even dimensions so this filter will:
Divide the original height and width by 2
Round it up to the nearest pixel
Multipl...
Inspect attached event handlers for any DOM element
...andlers are shown in the stock HTML inspector.
– ivan_pozdeev
Dec 5 '15 at 12:12
add a commen...
How to create duplicate allowed attributes
....GetCustomAttributes<MyCustomAttribute>();
– oo_dev
May 24 '18 at 12:04
add a comment
...
How do I strip non alphanumeric characters from a string and keep spaces?
...
Add spaces to the negated character group:
@search_query = @search_query.gsub(/[^0-9a-z ]/i, '')
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Escaping ampersand character in SQL string
...
Instead of
node_name = 'Geometric Vectors \& Matrices'
use
node_name = 'Geometric Vectors ' || chr(38) || ' Matrices'
38 is the ascii code for ampersand, and in this form it will be interpreted as a string, nothing else. I tried ...
Skip Git commit hooks
...k folder elsewhere, and setup a post-merge hook (git-scm.com/docs/githooks#_post_merge) which will detect if the pull affect the repo hook folder, and will propose to copy its content to your local hook folder (outside of the repo): that way, you can at least control if you want your hooks overridde...
UIButton remove all target-actions
...f those events to all action methods of all target objects
objective-c:
[_myButton removeTarget: //any validObject (or) nil
action:nil
forControlEvents:UIControlEventAllEvents];
swift:
myButton.removeTarget(*validObject or nil*, action:nil, forControlEvents:UIControlEvents.A...
What's a simple way to get a text input popup dialog box on an iPhone
... }];
[alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
// A block for configuring the text field prior to displaying the alert
}];
[alert addAction:defaultAction];
[alert addAction:cancelAction];
[self presentViewController:alert animated:YES completion:...