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Difference between DirectCast() and CType() in VB.NET
... convert a string to an integer. It has as much power as calling Convert.To___() in C#, where the ___ is the target type of your cast.
This is desirable because it's very powerful. However, this power comes at the cost of performance; it's not as fast as DirectCast() or C#'s cast operator because i...
Debug Error \"pure virtual function call\" 原因解析 - 更多技术 - 清泛...
...
public:
virtual void virtualFunc(){}
};
Base* pB = new Derived;
__try
{
delete pB; // . . . b)
pB = NULL;
}
__except(EXCEPTION_EXECUTE_HANDLER){
}
pB->virtualFunc(); // . . . c)
在b)处析构Derived对象的时候，在其基类析构函数中a)处抛出了...
How to parse unix timestamp to time.Time
...ut:
2014-07-16 20:55:46 +0000 UTC
Playground: http://play.golang.org/p/v_j6UIro7a
Edit:
Changed from strconv.Atoi to strconv.ParseInt to avoid int overflows on 32 bit systems.
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How to enable cURL in PHP / XAMPP
...
Since you're using XAMPP, uncomment the line
;extension=php_curl.dll
in xampp\apache\bin\php.ini, and then restart the Apache service.
NB: In newer XAMPP versions, PHP has moved to root xampp folder xampp\php\php.ini.
...
SQL - using alias in Group By
...
For mysql, sql_mode not including ONLY_FULL_GROUP_BY in the bitmask, the Optimizer has a chance to deliver better results with a varied / different use of the alias in the HAVING clause.
– Drew
Jul 4...
Listen for key press in .NET console app
... }
}
}
}
internal class ConsoleBusyIndicator
{
int _currentBusySymbol;
public char[] BusySymbols { get; set; }
public ConsoleBusyIndicator()
{
BusySymbols = new[] { '|', '/', '-', '\\' };
}
public void UpdateProgress()
{
while (true)
...
Create a CSV File for a user in PHP
...!== false || strpos($string, "\n") !== false) {
$string = '"' . str_replace('"', '""', $string) . '"';
}
return $string;
}
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What does a colon following a C++ constructor name do? [duplicate]
...olon operator (":") do in this constructor? Is it equivalent to MyClass(m_classID = -1, m_userdata = 0); ?
9 Answers
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“where 1=1” statement [duplicate]
...No magic, just practical
Example Code:
commandText = "select * from car_table where 1=1";
if (modelYear <> 0) commandText += " and year="+modelYear
if (manufacturer <> "") commandText += " and value="+QuotedStr(manufacturer)
if (color <> "") commandText += " and col...
Real world use cases of bitwise operators [closed]
...r to make some piece of hardware do what you want it to:
volatile uint32_t *register = (volatile uint32_t *)0x87000000;
uint32_t value;
uint32_t set_bit = 0x00010000;
uint32_t clear_bit = 0x00001000;
value = *register; // get current value from the registe...