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Maven build failed: “Unable to locate the Javac Compiler in: jre or jdk issue”
...
For me an extra step was needed: going to the properties of said project->java build path->libraries->select "JRE System Library", click Edit and select "Workspace default JRE"
– maayank
...
Null check in an enhanced for loop
... Note that Collections.emptyList() will avoid allocating an extra object (IIRC).
– Jon Skeet
Feb 12 '10 at 6:31
7
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What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
...performance problem to a function that was checking for the existence of a string in an array. So I ran some tests.
loaded 90,822 hosts
loading config took 0.087 seconds (array)
loading config took 0.152 seconds (object)
Loading 91k entries into an array (with validate & push) is faster than...
Proper use of the IDisposable interface
...d objects.
public class LoggingContext : IDisposable {
public Finicky(string name) {
Log.Write("Entering Log Context {0}", name);
Log.Indent();
}
public void Dispose() {
Log.Outdent();
}
public static void Main() {
Log.Write("Some initial stuff."...
What are the -Xms and -Xmx parameters when starting JVM?
...nary_prefix. In addition, because some unusable space is set aside for an extra pool of Survivor space, the amount of memory actually available according to Runtime.getRuntime().maxMemory() is less than the value specified via -Xmx
– nealmcb
Sep 30 '15 at 5:20...
Background color not showing in print preview
... via the @media print and @media screen.
Often times just setting up some extra @media print CSS is not enough because you still have all your other CSS included when printing as well. In these cases you just need to be aware of CSS specificity as the print rules don't automatically win against non...
How do I install ASP.NET MVC 5 in Visual Studio 2012?
...
I forgot to write back, but all that was required extra was the windows 8.1 sdk for .net 4.5.1, but the asp.net and web tools 2013.1 was included in update 4.
– pqsk
Dec 19 '13 at 19:14
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【最全】CSS响应式布局的5种实现方式 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...应断点阈值设定
（括号后面是样式的缩写）
<576px （Extra small）
>=576px （Small --- sm）
>=769px （Medium --- md）
>=992px （Large --- lg）
>=1200px （X-Large --- xl）
>=1400px （XX-Large ---- xxl）
2、在实际开发中，常用的两种适配方案
a...
Passing functions with arguments to another function in Python?
...o do this. My favorite way is using lambda because it avoids dependency on extra package and is the least verbose. Assume you have a function add(x, y) and you want to pass add(3, y) to some other function as parameter such that the other function decides the value for y.
Use lambda
# generic func...
Query for documents where array size is greater than 1
...le. See the server-side processing page
for more information.
2.Create extra field NamesArrayLength, update it with names array length and then use in queries:
db.accommodations.find({"NamesArrayLength": {$gt: 1} });
It will be better solution, and will work much faster (you can create index ...