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When should I use a table variable vs temporary table in sql server?
...e some suggestions are below (though the most reliable method is to simply test both with your specific workload).
If you need an index that cannot be created on a table variable then you will of course need a #temporary table. The details of this are version dependant however. For SQL Server 2012...
Static Initialization Blocks
...o matter how many objects of that type you create.
Example:
public class Test {
static{
System.out.println("Static");
}
{
System.out.println("Non-static block");
}
public static void main(String[] args) {
Test t = new Test();
Test t2 = new Tes...
Bash: If/Else statement in one line
... to explicitly check $?. Just do:
ps aux | grep some_proces[s] > /tmp/test.txt && echo 1 || echo 0
Note that this relies on echo not failing, which is certainly not guaranteed. A more reliable way to write this is:
if ps aux | grep some_proces[s] > /tmp/test.txt; then echo 1; el...
Multiple Updates in MySQL
...ql warnings into runtime exceptions in your app.
I made some performance tests for three of suggested variants, including the INSERT ... ON DUPLICATE KEY UPDATE variant, a variant with "case / when / then" clause and a naive approach with transaction. You may get the python code and results here. ...
Retrieving the inherited attribute names/values using Java Reflection
... getAllFields(fields, type.getSuperclass());
}
return fields;
}
@Test
public void getLinkedListFields() {
System.out.println(getAllFields(new LinkedList<Field>(), LinkedList.class));
}
share
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...
What is 'Pattern Matching' in functional languages?
...))));
Pattern matching in a nutshell
Pattern matching is a kind of type-testing. So let's say we created a stack object like the one above, we can implement methods to peek and pop the stack as follows:
let peek s =
match s with
| Cons(hd, tl) -> hd
| Nil -> failwith "Empty sta...
How to require a fork with composer
...
Using VCS works:
"name": "test/test",
"repositories": [{
"type": "vcs",
"url": "http://github.com/Nodge/lessphp"
}],
"require": {
"leafo/lessphp": "dev-master"
},
But if I require a module that has this composer.json, it doesn't work. It...
Why is “while ( !feof (file) )” always wrong?
...that actually queries the EOF state: Suppose you have a string and want to test that it represents an integer in its entirety, with no extra bits at the end except whitespace. Using C++ iostreams, it goes like this:
std::string input = " 123 "; // example
std::istringstream iss(input);
...
machine learning libraries in C# [closed]
...o create the '.Net version' of weka, then you can try to run the following tests:
[Fact]
public void BuildAndClassify()
{
var classifier = BuildClassifier();
AssertCanClassify(classifier);
}
[Fact]
public void DeserializeAndClassify()
{
BuildClassifier().Serialize("test.weka");
var classif...
How to evaluate http response codes from bash/shell script?
...
I haven't tested this on a 500 code, but it works on others like 200, 302 and 404.
response=$(curl --write-out '%{http_code}' --silent --output /dev/null servername)
Note, format provided for --write-out should be quoted.
As suggested...