大约有 46,000 项符合查询结果（耗时：0.0560秒） [XML]
WebSockets vs. Server-Sent events/EventSource
Both WebSockets and Server-Sent Events are capable of pushing data to browsers. To me they seem to be competing technologies. What is the difference between them? When would you choose one over the other?
...
Push Notifications in Android Platform
...
Google's official answer is the Android Cloud to Device Messaging Framework (deprecated) Google Cloud Messaging(deprecated) Firebase Cloud Messaging
It will work on Android >= 2.2 (on phones that have the Play Store).
...
Is the creation of Java class files deterministic?
...Oracle's javac actually produce different class files for the same input and compiler options?
11 Answers
...
When to favor ng-if vs. ng-show/ng-hide?
I understand that ng-show and ng-hide affect the class set on an element and that ng-if controls whether an element is rendered as part of the DOM.
...
How is Node.js inherently faster when it still relies on Threads internally?
I just watched the following video: Introduction to Node.js and still don't understand how you get the speed benefits.
6 ...
How to detect iPhone 5 (widescreen devices)?
I've just upgraded to XCode 4.5 GM and found out that you can now apply the '4" Retina' size to your view controller in the storyboard.
...
How can I exclude all “permission denied” messages from “find”?
...
Note:
* This answer probably goes deeper than the use case warrants, and find 2>/dev/null may be good enough in many situations. It may still be of interest for a cross-platform perspective and for its discussion of some advanced shell techniques in the interest of finding a solution that i...
How are virtual functions and vtable implemented?
...t 1 virtual function. There is a space overhead associated with the vtable and a time overhead associated with calling a virtual function vs a non-virtual function.
Do abstract classes simply have a NULL for the function pointer of at least one entry?
The answer is it is unspecified by the languag...
Design by contract using assertions or exceptions? [closed]
...ies, right? The two most prominent ways to do these checks are by assert and by exception .
14 Answers
...
When to use dynamic vs. static libraries
...ing a class library in C++, you can choose between dynamic ( .dll , .so ) and static ( .lib , .a ) libraries. What is the difference between them and when is it appropriate to use which?
...