大约有 38,000 项符合查询结果（耗时：0.0385秒） [XML]
How do I check if an HTML element is empty using jQuery?
...$('#element').is(':empty')){
//do something
}
for more info see http://api.jquery.com/is/ and http://api.jquery.com/empty-selector/
EDIT:
As some have pointed, the browser interpretation of an empty element can vary. If you would like to ignore invisible elements such as spaces and line breaks...
Collections.emptyMap() vs new HashMap()
...
@fgysin: If you have an API where clients are expected to modify the collection, then yes, it does not make sense to return an immutable collection. But if you have an API where you return a collection that clients must not modify and should just it...
How to set a Timer in Java?
...
@ErnestasGruodis The core APIs list the constructor as public: docs.oracle.com/javase/7/docs/api/java/util/Timer.html#Timer() You might have a different Timer class in your classpath - try java.util.Timer as the class.
– andrewmu...
Delete all documents from index/type without deleting type
...
Ftr: in Elasticsearch 2.0 the delete by query API has been removed from the core and now lives in a plugin.
– dtk
Nov 16 '15 at 14:41
...
Do NSUserDefaults persist through an Update to an app in the Appstore?
...ems with NSUserDefaults in a data protection context:
Its a fully abstract API: the presence and location of its backing store is not considered part of that API, so you can’t explicitly manage its data protection.
Note On recent versions of OS X NSUserDefaults is managed by a daemon and folks who...
window.close and self.close do not close the window in Chrome
...nkey and Tampermonkey could reasonably provide this functionality in their API (essentially packaging the extension work for you).
Consider making a feature request.
The hacky workarounds:
Chrome is currently was vulnerable to the "self redirection" exploit. So code like this used to work in ...
What should I put in a meteor .gitignore file?
... correct. You should ignore your settings.json if you're using it to store API keys.
– Jesse
Apr 22 '15 at 13:49
1
...
Java: function for arrays like PHP's join()?
...
In Java 8 you can use
1) Stream API :
String[] a = new String[] {"a", "b", "c"};
String result = Arrays.stream(a).collect(Collectors.joining(", "));
2) new String.join method: https://stackoverflow.com/a/21756398/466677
3) java.util.StringJoiner class:...
400 BAD request HTTP error code meaning?
...y the client to the server didn't follow the rules.
In the case of a REST API with a JSON payload, 400's are typically, and correctly I would say, used to indicate that the JSON is invalid in some way according to the API specification for the service.
By that logic, both the scenarios you provide...
How to change colors of a Drawable in Android?
...
The new support v4 bring tint back to api 4.
you can do it like this
public static Drawable setTint(Drawable d, int color) {
Drawable wrappedDrawable = DrawableCompat.wrap(d);
DrawableCompat.setTint(wrappedDrawable, color);
return wrappedDrawable;
}...