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How to create CSV Excel file C#? [closed]
... Excel support is only for basic scenarios. If you need custom formatting, charts, etc. you must go for a custom code. It's strongly recommended to directly use the NPOI library
– A K
Mar 11 '17 at 20:54
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Best way to check if a URL is valid
...CII URLs to be valid; internationalized domain names (containing non-ASCII characters) will fail.
Example:
if (filter_var($url, FILTER_VALIDATE_URL) === FALSE) {
die('Not a valid URL');
}
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Should I inherit from std::exception?
...a C-String or a std::string to the constructor that will be returned (as a char const*) when what() is called.
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Regex to validate password strength
... wonder why not using quantifiers? At least 1 special, 1 number, 1 special char, 8 character: ^(?=.*([A-Z]){1,})(?=.*[!@#$&*]{1,})(?=.*[0-9]{1,})(?=.*[a-z]{1,}).{8,100}$
– RockOnGom
Oct 15 '18 at 7:48
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How do I duplicate a whole line in Emacs?
...ditor, but in Emacs there's always a customization. C-d is bound to delete-char by default, so how about C-c C-d? Just add the following to your .emacs:
(global-set-key "\C-c\C-d" "\C-a\C- \C-n\M-w\C-y")
(@Nathan's elisp version is probably preferable, because it won't break if any of the key bin...
What is the difference between static_cast and C style casting?
...For example, the C-style cast would allow an integer pointer to point to a char.
char c = 10; // 1 byte
int *p = (int*)&c; // 4 bytes
Since this results in a 4-byte pointer ( a pointer to 4-byte datatype) pointing to 1 byte of allocated memory, writing to this pointer will either cause ...
What does 'COLLATE SQL_Latin1_General_CP1_CI_AS' do?
...s up into interesting parts:
latin1 makes the server treat strings using charset latin 1, basically ascii
CP1 stands for Code Page 1252
CI case insensitive comparisons so 'ABC' would equal 'abc'
AS accent sensitive, so 'ü' does not equal 'u'
P.S. For more detailed information be sure to read @s...
Convert a byte array to integer in Java and vice versa
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Not a solution for 3 byte stride. We can get Char, Short, Int. I suppose I could pad to 4 bytes and discard the 4th each time, but I would rather not.
– John
Jun 13 at 7:31
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How to check if a string “StartsWith” another string?
... @cobbal Maybe. But .lastIndexOf(input, 0) compares the first N chars, whereas .substring(0, input.length) === input counts N, substrings the data to N length, and then compares those N chars. Unless there is code optimization, this second version cannot be faster than the other. Don't ge...
C++ Dynamic Shared Library on Linux
...ostream>
#include "myclass.h"
using namespace std;
int main(int argc, char **argv)
{
/* on Linux, use "./myclass.so" */
void* handle = dlopen("myclass.so", RTLD_LAZY);
MyClass* (*create)();
void (*destroy)(MyClass*);
create = (MyClass* (*)())dlsym(handle, "create_object");
destroy...