大约有 40,000 项符合查询结果(耗时:0.0520秒) [XML]

https://stackoverflow.com/ques... 

Get list of a class' instance methods

... You actually want TestClass.instance_methods, unless you're interested in what TestClass itself can do. class TestClass def method1 end def method2 end def method3 end end TestClass.methods.grep(/method1/) # => [] ...
https://stackoverflow.com/ques... 

Error java.lang.OutOfMemoryError: GC overhead limit exceeded

...garbage collector is taking an excessive amount of time (by default 98% of all CPU time of the process) and recovers very little memory in each run (by default 2% of the heap). This effectively means that your program stops doing any progress and is busy running only the garbage collection at all t...
https://stackoverflow.com/ques... 

What does “zend_mm_heap corrupted” mean

All of the sudden I've been having problems with my application that I've never had before. I decided to check the Apache's error log, and I found an error message saying "zend_mm_heap corrupted". What does this mean. ...
https://stackoverflow.com/ques... 

Why does Java switch on contiguous ints appear to run faster with added cases?

...value has been removed in JDK 8 after more benchmarking was performed. Finally, when the method becomes too long (> 25 cases in my tests), it is in not inlined any longer with the default JVM settings - that is the likeliest cause for the drop in performance at that point. With 5 cases, the d...
https://stackoverflow.com/ques... 

PostgreSQL error 'Could not connect to server: No such file or directory'

...u are on OS X Here is the fix: Stop the database cd /var sudo rm -r pgsql_socket sudo ln -s /tmp pgsql_socket chown _postgres:_postgres pgsql_socket Restart PostgreSQL (not your computer) More information is available at "postgresql 9.0.3. on Lion Dev Preview 1". ...
https://stackoverflow.com/ques... 

How does Stack Overflow generate its SEO-friendly URLs?

...I benchmarked it). I figured I'd optimize it because this function can be called hundreds of times per page. /// <summary> /// Produces optional, URL-friendly version of a title, "like-this-one". /// hand-tuned for speed, reflects performance refactoring contributed /// by John Gietzen (user...
https://stackoverflow.com/ques... 

Multiple ModelAdmins/views for same model in Django admin

...l may be registered only once. class PostAdmin(admin.ModelAdmin): list_display = ('title', 'pubdate','user') class MyPost(Post): class Meta: proxy = True class MyPostAdmin(PostAdmin): def get_queryset(self, request): return self.model.objects.filter(user = request.user...
https://stackoverflow.com/ques... 

Understanding ibeacon distancing

...t 1 meter away. Each beacon must be calibrated with this txPower value to allow accurate distance estimates. While the distance estimates are useful, they are not perfect, and require that you control for other variables. Be sure you read up on the complexities and limitations before misusing thi...
https://stackoverflow.com/ques... 

How can I deploy an iPhone application from Xcode to a real iPhone device?

... do this a lot, be sure to check the other answers - you can make XCode do all the job to you but it's a troublesome procedure to trick it on doing that. – cregox Apr 16 '11 at 16:06 ...
https://stackoverflow.com/ques... 

windows service vs scheduled task

...ust need to figure out how to support failover... Original Answer: I'm really not a fan of Windows Scheduler. The user's password must be provided as @moodforall points out above, which is fun when someone changes that user's password. The other major annoyance with Windows Scheduler is that it r...