大约有 45,000 项符合查询结果（耗时：0.0572秒） [XML]
Best way to detect when a user leaves a web page?
...
Try the onbeforeunload event: It is fired just before the page is unloaded. It also allows you to ask back if the user really wants to leave. See the demo onbeforeunload Demo.
Alternatively, you can send out an Ajax request when he leaves.
...
IPN vs PDT in Paypal
...the notification. For that reason I would recommend implementing both.
With PDT you get the notification instantly and can do any additional processing required and show the user a confirmation page.
With IPN you are guaranteed to be notified that the payment was received even if the user's compu...
Why can't I initialize non-const static member or static array in class?
Why can't I initialize non-const static member or static array in a class?
5 Answers
...
Fastest way to check if a string matches a regexp in ruby?
...
Starting with Ruby 2.4.0, you may use RegExp#match?:
pattern.match?(string)
Regexp#match? is explicitly listed as a performance enhancement in the release notes for 2.4.0, as it avoids object allocations performed by other methods s...
Can C++ code be valid in both C++03 and C++11 but do different things?
Is it possible for C++ code to conform to both the C++03 standard and the C++11 standard, but do different things depending on under which standard it is being compiled?
...
Postgres: SQL to list table foreign keys
...follow
|
edited Dec 26 '18 at 9:00
Bear Brown
15.7k88 gold badges3333 silver badges5858 bronze badges
...
iPhone Safari Web App opens links in new window
I have problem with web after adding icon to Home Screen. If the web is launched from Home Screen, all links will open in new window in Safari (and lose full screen functionality). How can I prevent it? I couldn't find any help, only the same unanswered question.
...
How do you convert Html to plain text?
...
If you are talking about tag stripping, it is relatively straight forward if you don't have to worry about things like <script> tags. If all you need to do is display the text without the tags you can accomplish that with a regular expression:
<[^>]*&...
Why is NaN not equal to NaN? [duplicate]
... NaN (not a number) and prescribes that NaN should compare as not equal to itself. Why is that?
6 Answers
...
Segue to another storyboard?
Is it possible to segue from one storyboard to another, or to embed a storyboard in a view controller in another storyboard? I need to place a UITabBarController in a UINavigationController , and I'd like to keep them nice and separate.
...