大约有 22,000 项符合查询结果(耗时:0.0571秒) [XML]
What is the default value for enum variable?
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Thanks, and what about enums defined with char instead of int. e.g. enum Status { Active = 'A', Inactive='I'}
– Fernando Torres
Apr 24 '15 at 16:17
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How long should SQL email fields be? [duplicate]
...l address can basically be indefinitely long so any size I impose on my varchar email address field is going to be arbitrary. However, I was wondering what the "standard" is? How long do you guys make it? (same question for Name field...)
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How to throw a C++ exception
...e the example (of what NOT to do):
#include <iostream>
#include <string>
using namespace std;
class MyException : public exception
{
public:
MyException(const string& msg) : m_msg(msg)
{
cout << "MyException::MyException - set m_msg to:" << m_msg <&l...
Where is C not a subset of C++? [closed]
...zeof('a') is equal to sizeof(int).
In C++, sizeof('a') is equal to sizeof(char).
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Executing Batch File in C#
...streams in order to find out what's happening:
static void ExecuteCommand(string command)
{
int exitCode;
ProcessStartInfo processInfo;
Process process;
processInfo = new ProcessStartInfo("cmd.exe", "/c " + command);
processInfo.CreateNoWindow = true;
processInfo.UseShellEx...
Best way to store time (hh:mm) in a database
... line. ALWAYS consider all time zones.
C#
A DateTime renders nicely to a string in C#. The ToString(string Format) method is compact and easy to read.
E.g.
new TimeSpan(EventStart.Ticks - EventEnd.Ticks).ToString("h'h 'm'm 's's'")
SQL server
Also if you're reading your database seperate to y...
get current url in twig template?
...ute_parameters won't work if you have some additional params in your query string. You could use app.request.query.all instead.
– wdev
Nov 26 '12 at 17:42
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@try - catch block in Objective-C
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All work perfectly :)
NSString *test = @"test";
unichar a;
int index = 5;
@try {
a = [test characterAtIndex:index];
}
@catch (NSException *exception) {
NSLog(@"%@", exception.reason);
NSLog(@"Char at index %d cannot be found", ...
How can I echo a newline in a batch file?
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Is it possible while providing a string within a single echo statement?
– Brian R. Bondy
Sep 25 '08 at 11:52
6
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What's the difference between --general-numeric-sort and --numeric-sort options in gnu sort
...eading ‘+’ nor exponential
notation is recognized. To compare
such strings numerically, use the
--general-numeric-sort (-g) option.
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