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What is a “callback” in C and how are they implemented?
...dlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include "../../common_typedef.h"
typedef void (*call_back) (S32, S32);
void test_call_back(S32 a, S32 b)
{
printf("In call back function, a:%d \t b:%d \n", a, b);
}
void call_callback_func(call_back back)...
How to insert a line break in a SQL Server VARCHAR/NVARCHAR string
...nsert-carriage-return-and-new-line-feed-in-code/
You just concatenate the string and insert a CHAR(13) where you want your line break.
Example:
DECLARE @text NVARCHAR(100)
SET @text = 'This is line 1.' + CHAR(13) + 'This is line 2.'
SELECT @text
This prints out the following:
This is line ...
Random alpha-numeric string in JavaScript? [duplicate]
...on) to generate a random alpha-numeric (uppercase, lowercase, and numbers) string in JavaScript to use as a probably-unique identifier?
...
Use Expect in a Bash script to provide a password to an SSH command
... starting with a dash (-) will fail otherwise.
The above won't interpret a string starting with a dash as an option to the send command.
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How to change string into QString?
...
If by string you mean std::string you can do it with this method:
QString QString::fromStdString(const std::string & str)
std::string str = "Hello world";
QString qstr = QString::fromStdString(str);
If by string you mean ...
How do I remove all non alphanumeric characters from a string except dash?
How do I remove all non alphanumeric characters from a string except dash and space characters?
13 Answers
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How to set SQL Server connection string?
...hen I connect my application to SQL Server on my PC, I know the connection string (server name, password etc.), but when I connect it to another PC, the SQL Server connection string is different. Is there a common account in SQL Server that come with default account that can connect? I have heard ab...
How can I validate a string to only allow alphanumeric characters in it?
How can I validate a string using Regular Expressions to only allow alphanumeric characters in it?
10 Answers
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Are the days of passing const std::string & as a parameter over?
...Herb Sutter who suggested that the reasons to pass std::vector and std::string by const & are largely gone. He suggested that writing a function such as the following is now preferable:
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Replace a character at a specific index in a string?
I'm trying to replace a character at a specific index in a string.
8 Answers
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