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Are static variables shared between threads?
...one thread makes becoming visible to other threads in a timely manner (actually the JVM has no obligation to make those changes visible to you at all, in any time frame), unless you establish a happens-before relationship.
Here's a quote from that link (supplied in the comment by Jed Wesley-Smith):
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How to override !important?
...he !important rule.
td.a-semantic-class-name { height: 100px; }
I personally never use !important in my style sheets. Remember that the C in CSS is for cascading. Using !important will break this.
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How to check if a process is running via a batch script
...orked for me nicely (windows XP SP3). IMHO this is the most elegant way of all proposed here, using just the tools shipped with windows
– hello_earth
Jul 8 '10 at 15:30
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psql invalid command \N while restore sql
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Postgres uses "\N" as substitute symbol for NULL value. But all psql commands starts by backslash "\" symbol. So you can get this messages, when probably copy statement fails, but a loading of dump continues. This message is only false alarm. You have to search a lines before for reas...
将Genymotion模拟器与App Inventor一起使用 · App Inventor 2 中文网
... with a Genymotion virtual device?How to solve the "failure install failed cpu api incompatible" error message when installing an APK file in Genymotion?How to copy virtual devices downloaded by Genymotion to another machine?How to transfer folder/files from your computer to the Genymotion instance?...
Boolean vs boolean in Java
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It should be noted the a Boolean actually has 3 states... true, false and null where a boolean has the logical 2 states (true and false)
– respectTheCode
Jun 6 '14 at 15:46
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How can I clear or empty a StringBuilder? [duplicate]
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Two ways that work:
Use stringBuilderObj.setLength(0).
Allocate a new one with new StringBuilder() instead of clearing the buffer.
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ComponentGroup 组件组扩展：监控内容变化和批量启用禁用组件 · App Inventor 2 中文网
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ComponentGroup 扩展解决了 App Inventor 中的两个常见问题：
内容变化检测：无需使用复杂的定时器和值比较即可检测组件内容是否被修改
批量启用/禁用：一次性启用或禁用一组组件（例如在考试期间禁用输入区域）
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Difference between StringBuilder and StringBuffer
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and synchronization is virtually never required. If someone wants to synchronize on a StringBuilder, they can just surround the entire block of code with a synchronized (sb) { } on the instance
– locka
Apr 24 '13 a...
Set selected item of spinner programmatically
...e answer by Marco HC uses Runnable wich is a last resort due to additional CPU load. The answer is - you should simply choose correct place to call to setSelection(), for example it works for me:
@Override
public void onResume() {
super.onResume();
yourSpinner.setSelection(pos);
}
But ...