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How to convert a double to long without casting?
...e is the rounding way which doesn't truncate. Hurried to look it up in the Java API Manual:
double d = 1234.56;
long x = Math.round(d); //1235
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What does “|=” mean? (pipe equal operator)
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@A.R.S.: I can't think of a counter-example in Java (maybe if j is volatile?), but I'll take your word for it.
– David Schwartz
Jan 12 '13 at 17:10
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How to optimize for-comprehensions and loops in Scala?
So Scala is supposed to be as fast as Java. I'm revisiting some Project Euler problems in Scala that I originally tackled in Java. Specifically Problem 5: "What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?"
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BLE（一）概述&工作流程&常见问题 - 创客硬件开发 - 清泛IT社区，...
...E工作流程0x21 工作过程蓝牙适用于短距离无线通信，正常运行时传输距离为10m（低功耗模式下为100m），频段2.4Ghz。先进行三个蓝牙术语介绍：
配对:配对是指两个蓝牙设备首次通讯时，相互确认的过程。两个蓝牙设备之间一经...
When serving JavaScript files, is it better to use the application/javascript or application/x-javas
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text/javascript is obsolete
application/x-javascript was experimental while deciding to move to…
application/javascript is the current official MIME type for JS
That said, browsers often ignore the content-type sent by the ser...
Warning - Build path specifies execution environment J2SE-1.4
... Eclipse from your project:
Right-click on your project
Click Properties
Java build path: Libraries; Remove the "JRE System Library[J2SE 1.4]"
Click Add Library -> JRE System Library
Select the new "Execution Environment" or Workspace default JRE
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What is a 'semantic predicate' in ANTLR?
...se();
}
}
Test it by generating the lexer and parser, compiling all .java files and
running the Main class:
java -cp antlr-3.2.jar org.antlr.Tool Numbers.g
javac -cp antlr-3.2.jar *.java
java -cp .:antlr-3.2.jar Main
When doing so, nothing is printed to the console, which indicates that n...
Why does the month argument range from 0 to 11 in JavaScript's Date constructor?
When initializing a new Date object in JavaScript using the below call, I found out that the month argument counts starting from zero.
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Can't choose class as main class in IntelliJ
I have a Java project in IntelliJ to which I just added a bunch of files in a nested folder hierarchy. Many of these files are tests and include the main method, so I should be able to run them. However I cannot figure out how to do this.
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What is the “Execute Around” idiom?
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// Code to use the stream goes here
}
});
// Calling it with Java 8 Lambda Expression:
executeWithFile("filename.txt", s -> System.out.println(s.read()));
// Or with Java 8 Method reference:
executeWithFile("filename.txt", ClassName::methodName);
The calling code doesn't need to ...