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When would you use a WeakHashMap or a WeakReference?
...s, because loading them from disk
is very expensive and you want to
avoid the possibility of having two
copies of the (potentially gigantic)
image in memory at once.
Because an image cache is supposed to
prevent us from reloading images when
we don't absolutely need to, you will
q...
Node / Express: EADDRINUSE, Address already in use - Kill server
... currently running stacks here and there) it makes no sense to put that inside the exit event...
On crash, do process.on('uncaughtException', ..) and on kill do process.on('SIGTERM', ..)
That being said, SIGTERM (default kill signal) lets the app clean up, while SIGKILL (immediate termination) won...
Convert JSON to Map
...ou work with Maven project, you will need <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.4.4</version> </dependency>
– LoBo
Nov 2 '15 a...
jQuery .ready in a dynamically inserted iframe
...nction callIframe(url, callback) {
$(document.body).append('<IFRAME id="myId" ...>');
$('iframe#myId').attr('src', url);
$('iframe#myId').load(function() {
callback(this);
});
}
In dealing with iframes I found good enough to use load event instead of document ready e...
PHP multidimensional array search by value
I have an array where I want to search the uid and get the key of the array.
23 Answers
...
Android Fragment handle back button press [duplicate]
...
FragmentTransaction tx = fragmentManager.beginTransation();
tx.replace( R.id.fragment, new MyFragment() ).addToBackStack( "tag" ).commit();
If you require more detailed control (i.e. when some Fragments are visible, you want to suppress the back key) you can set an OnKeyListener on the parent vie...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...
This note is interesting for two aspects:
For App Inventor users, it provides a functioning Rotation Detector component that can be shared and incorporated into projects.
For App Inventor developers, it can serve as a template for a general rotation detector component that can be modified to fulf...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...
This note is interesting for two aspects:
For App Inventor users, it provides a functioning Rotation Detector component that can be shared and incorporated into projects.
For App Inventor developers, it can serve as a template for a general rotation detector component that can be modified to fulf...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...
This note is interesting for two aspects:
For App Inventor users, it provides a functioning Rotation Detector component that can be shared and incorporated into projects.
For App Inventor developers, it can serve as a template for a general rotation detector component that can be modified to fulf...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...
This note is interesting for two aspects:
For App Inventor users, it provides a functioning Rotation Detector component that can be shared and incorporated into projects.
For App Inventor developers, it can serve as a template for a general rotation detector component that can be modified to fulf...