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Finding all possible permutations of a given string in python
...nt to generate all permutations from that string, by changing the order of characters in it. For example, say:
24 Answers
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Passing variable arguments to another function that accepts a variable argument list
...#include <stdio.h>
template<typename... Args> void test(const char * f, Args... args) {
printf(f, args...);
}
int main()
{
int a = 2;
test("%s\n", "test");
test("%s %d %d %p\n", "second test", 2, a, &a);
}
At the very least, it works with g++.
...
scanf() leaves the new line char in the buffer
...ing whitespace automatically before trying to parse conversions other than characters. The character formats (primarily %c; also scan sets %[…] — and %n) are the exception; they don't skip whitespace.
Use " %c" with a leading blank to skip optional white space. Do not use a trailing blank in ...
Why does appending “” to a String save memory?
...s that substring() gives a window onto an existing String - or rather, the character array underlying the original String. Hence it will consume the same memory as the original String. This can be advantageous in some circumstances, but problematic if you want to get a substring and dispose of the o...
C++ templates Turing-complete?
...;
template<int n>
struct State {
enum { value = n };
static char const * name;
};
template<int n>
char const* State<n>::name = "unnamed";
struct QAccept {
enum { value = -1 };
static char const* name;
};
struct QReject {
enum { value = -2 };
static char ...
How to convert an int value to string in Go?
...)
func main() {
t := strconv.Itoa(123)
fmt.Println(t)
}
You can concat strings simply by +'ing them, or by using the Join function of the strings package.
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What does 'COLLATE SQL_Latin1_General_CP1_CI_AS' do?
...e a SQL_Latin1_General_CI_AS. Rather, there is a Latin1_General_CI_AS. See SELECT * FROM fn_helpcollations() where name IN ('SQL_Latin1_General_CP1_CI_AS','Latin1_General_CI_AS','SQL_Latin1_General_CI_AS');. There are subtle differences regarding sorting and comparison as between the two collations....
Converting string to title case
I have a string which contains words in a mixture of upper and lower case characters.
23 Answers
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What is a simple command line program or script to backup SQL server databases?
...ng to backup all Databases:
Use Master
Declare @ToExecute VarChar(8000)
Select @ToExecute = Coalesce(@ToExecute + 'Backup Database ' + [Name] + ' To Disk = ''D:\Backups\Databases\' + [Name] + '.bak'' With Format;' + char(13),'')
From
Master..Sysdatabases
Where
[Name] Not In ('tempdb')
and d...
How do I get the path of a process in Unix / Linux
...swers were specific to linux.
If you need also unix, then you need this:
char * getExecPath (char * path,size_t dest_len, char * argv0)
{
char * baseName = NULL;
char * systemPath = NULL;
char * candidateDir = NULL;
/* the easiest case: we are in linux */
size_t buff_len;
...