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Unresolved external symbol on static class members
...st add the definitions to match your declarations of X and Y
unsigned char test::X;
unsigned char test::Y;
somewhere. You might want to also initialize a static member
unsigned char test::X = 4;
and again, you do that in the definition (usually in a CXX file) not in the declaration (which is ofte...
Is the != check thread safe?
...
In the absence of synchronization this code
Object a;
public boolean test() {
return a != a;
}
may produce true. 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
...
a...
How to avoid the “Circular view path” exception with Spring MVC test
...
This has nothing to do with Spring MVC testing.
When you don't declare a ViewResolver, Spring registers a default InternalResourceViewResolver which creates instances of JstlView for rendering the View.
The JstlView class extends InternalResourceView which is
...
TSQL - Cast string to integer or return default value
... END
IF ABS(@I) > 2147483647 RETURN NULL
RETURN @I
END
GO
-- Testing
DECLARE @Test TABLE(Value nvarchar(50)) -- Result
INSERT INTO @Test SELECT '1234' -- 1234
INSERT INTO @Test SELECT '1,234' -- 1234
INSERT INTO @Test SELECT '1234.0' -- 1234
INSERT INTO...
How to find and return a duplicate value in array
...
It's linear, O(n), but now needs to manage multiple lines-of-code, needs test cases, etc.
If you need an even faster solution, maybe try C instead.
And here is the gist comparing different solutions: https://gist.github.com/naveed-ahmad/8f0b926ffccf5fbd206a1cc58ce9743e
...
Error Dropping Database (Can't rmdir '.test\', errno: 17)
...next process was to display the default databases (info. schema, mysql and test) which was achieved by using "SHOW DATABASES;"
...
What's the difference between Html.Label, Html.LabelFor and Html.LabelForModel
...he model property matching the string expression):
// Model
public string Test { get; set; }
// View
@Html.Label("Test")
// Output
<label for="Test">Test</label>
Html.LabelFor gives you a label for the property represented by the provided expression (typically a model property):
//...
How to call a shell script from python code?
...ple:
>>> import subprocess
>>> subprocess.call(['sh', './test.sh']) # Thanks @Jim Dennis for suggesting the []
0
>>>
Where test.sh is a simple shell script and 0 is its return value for this run.
...
Java 8 Streams: multiple filters vs. complex condition
...hat big.
You can take a look on my GitHub project, where I did performance tests for multiple array iteration options
For small array 10 element throughput ops/s:
For medium 10,000 elements throughput ops/s:
For large array 1,000,000 elements throughput ops/s:
NOTE: tests runs on
8 CPU
1 ...
搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
...ongodb测试文件夹
#存放整个mongodb文件
mkdir -p /data/mongodbtest/single
#存放mongodb数据文件
mkdir -p /data/mongodbtest/single/data
#进入mongodb文件夹
cd /data/mongodbtest/single
2、下载mongodb的安装程序包
wget http://fastdl.mongodb.org/linux/mongodb-...