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When to use AtomicReference in Java?
...reference, for which monitor-based synchronization is not appropriate. Suppose you want to check to see if a specific field only if the state of the object remains as you last checked:
AtomicReference<Object> cache = new AtomicReference<Object>();
Object cachedValue = new Object();
cac...
完美解决phpcms批量移动内容后，新闻心情、评论排行等不更新的问题 - 更多...
...nt、mood相关的表中catid没有更新。
解决方法：只需修改一个文件搞定 phpcms/modules/content/content.php
/**
* 批量移动文章
*/
public function remove() {...
改为：
/**
* 批量移动文章
*/
public fun...
Running multiple AsyncTasks at the same time — not possible?
... the stuff from doInBackground(). The issue is initially (in early Android OS versions) the pool size was just 1, meaning no parallel computations for a bunch of AsyncTasks. But later they fixed that and now the size is 5, so at most 5 AsyncTasks can run simultaneously. Unfortunately I don't remembe...
How do I choose between Semaphore and SemaphoreSlim?
... system-wide. This would mean that a SemaphoreSlim could not be used for cross-process synchronization.
The MSDN documentation also indicates that SemSlim should be used when "wait times are expected to be very short". That would usually dovetail nicely with the idea that the slim version is more l...
Why use Ruby instead of Smalltalk? [closed]
... Smalltalk did substantially address the insularity.
The class library of most of the main smalltalk implementations (VisualWorks, VisualAge etc.) was large and had reputation for a fairly steep learning curve. Most key functionality in Smalltalk is hidden away somewhere in the class library, even ...
git-diff to ignore ^M
...s contains ^M as newline separators. Diffing these files are apparently impossible, since git-diff sees it as the entire file is just a single line.
...
If unit testing is so great, why aren't more companies doing it? [closed]
... then -- I have no idea what our code coverage was like and I was writing most of the unit tests. Since then I've run into some companies that do lots of testing, but it's chair testing: relies on a person being there, has low repeatibility and low chance of catching bugs. The other attitude is: it ...
select * vs select column
If I just need 2/3 columns and I query SELECT * instead of providing those columns in select query, is there any performance degradation regarding more/less I/O or memory?
...
App Inventor 2 中文网原创内容 · App Inventor 2 中文网
...？
【技巧】组件过多，水平/垂直布局显示不下，需要一个滚动条？
【技巧】App Inventor 2 如何去掉顶部标题栏实现全屏？
【技巧】App Inventor 2 模拟sleep函数
【技巧】App Inventor 2 过滤蓝牙设备列表
【代码简洁之道】App Inven...
How does a garbage collector avoid an infinite loop here?
...minated and the process will terminate. These are old values though so Microsoft might have tweaked the actual numbers or even the whole algorithm by now. Se blog.stephencleary.com/2009/08/finalizers-at-process-exit.html
– Lasse V. Karlsen
Jul 9 '14 at 19:52
...