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How to see query history in SQL Server Management Studio
Is the query history stored in some log files? If yes, can you tell me how to find their location? If not, can you give me any advice on how to see it?
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How do I convert uint to int in C#?
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Given:
uint n = 3;
int i = checked((int)n); //throws OverflowException if n > Int32.MaxValue
int i = unchecked((int)n); //converts the bits only
//i will be negative if n > Int32.MaxValue
int i = (int)n; //same behavior as unchecked
or
int i = Convert.ToInt3...
Make first letter of a string upper case (with maximum performance)
...lly old answers
public static string FirstCharToUpper(string input)
{
if (String.IsNullOrEmpty(input))
throw new ArgumentException("ARGH!");
return input.First().ToString().ToUpper() + String.Join("", input.Skip(1));
}
EDIT:
This version is shorter. For a faster solution take a lo...
MySQL load NULL values from CSV data
...field into a local variable, and then sets the actual field value to NULL, if the local variable ends up containing an empty string:
LOAD DATA INFILE '/tmp/testdata.txt'
INTO TABLE moo
FIELDS TERMINATED BY ","
LINES TERMINATED BY "\n"
(one, two, three, @vfour, five)
SET four = NULLIF(@vfour,'')
;
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Is it safe to check floating point values for equality to 0?
...equality between double or decimal type values normally, but I'm wondering if 0 is a special case.
9 Answers
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Database: To delete or not to delete records
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It definitely depends on the actual content of your database. If you're using it to store session information, then by all means wipe it immediately when the session expires (or is closed), you don't want that garbage lying around. As it cannot really be used again for any practical pur...
static const vs #define
... don't know exactly what you are getting at with the "static" part though. If you are declaring globally, I'd put it in an anonymous namespace instead of using static. For example
namespace {
unsigned const seconds_per_minute = 60;
};
int main (int argc; char *argv[]) {
...
}
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Call removeView() on the child's parent first
...t. since there is no parent at the beginning, there is nothing to remove. if (mAdView.getParent()!=null) ((ViewGroup) mAdView.getParent()).removeView(mAdView);
– Tarek
Sep 8 '16 at 19:46
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Why are global variables evil? [closed]
...so Evil? - Software Engineering Stack Exchange
Are global variables bad?
If you want to go deeper and find out why side effects are all about, and many other enlightening things, you should learn Functional Programming:
Side effect (computer science) - Wikipedia
Why are side-effects considered e...
App Inventor 2 XML数据解析教程 - 从Web API获取和解析XML · App Inventor 2 中文网
...查解析错误
var errorNode = xmlDoc.querySelector('parsererror');
if (errorNode) {
window.AppInventor.setWebViewString("ERROR:" + errorNode.textContent);
return;
}
return xmlDoc;
}
// 提取单个元素文本
function getElementText(xmlString, tagName) {
var xmlDoc = parseXM...