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Select unique or distinct values from a list in UNIX shell script
...mmandline options:
Given the following input:
class
jar
jar
jar
bin
bin
java
uniq will output all lines exactly once:
class
jar
bin
java
uniq -d will output all lines that appear more than once, and it will print them once:
jar
bin
uniq -u will output all lines that appear exactly once,...
Is the != check thread safe?
... This is the bytecode for test()
ALOAD 0
GETFIELD test/Test1.a : Ljava/lang/Object;
ALOAD 0
GETFIELD test/Test1.a : Ljava/lang/Object;
IF_ACMPEQ L1
...
as we can see it loads field a to local vars twice, it's a non-atomic operation, if a was changed in between by another thre...
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...相关的几点：
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熟悉开发平台, 不同的开发平台，有不同的API, 有不同的工作原理，同样是Java代...
Does Java 8 provide a good way to repeat a value or function?
...
Closures will completely transform Java code, for the better. Looking forward to that day...
– Marko Topolnik
Aug 30 '13 at 12:11
1
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Why doesn't the JVM cache JIT compiled code?
... to take resources from other projects. Given the choice between this and Java 8 lambda+streams I'd rather have the latter.
– Thorbjørn Ravn Andersen
Jan 1 '15 at 19:20
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Java “params” in method signature?
...
In Java it's called varargs, and the syntax looks like a regular parameter, but with an ellipsis ("...") after the type:
public void foo(Object... bar) {
for (Object baz : bar) {
System.out.println(baz.toString());
...
When using the Java debugger in Intellij what does “Drop Frame” mean?
I was using the Java debugger within Intellij 8 and noticed a button labeled "drop frame", does anybody know what purpose this serves? How/why would this be used/useful?
...
Will Google Android ever support .NET? [closed]
...udio, building plugins for MonoDevelop on Mac and Windows and exposing the Java Android APIs to .NET languages. This is now available at http://monodroid.net
Getting Started: http://monodroid.net/Welcome
Documentation: http://monodroid.net/Documentation
Tutorials: http://monodroid.net/Tutorials
...
Typing Enter/Return key using Python and Selenium?
...um.Keys
WebElement.sendKeys(Keys.RETURN);
the import statement is for Java, for other languages it is maybe a different, for example python: from selenium.webdriver.common.keys import Keys
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Error message 'java.net.SocketException: socket failed: EACCES (Permission denied)'
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Add those source code to your Java file as below:
StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectDiskReads().detectDiskWrites().detectNetwork().penaltyLog().build());
...