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Static constant string (class member)
... requirement for using a STL string, you might as well just define a const char*. (less overhead)
– KSchmidt
Oct 14 '09 at 2:23
51
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Group query results by month and year in postgresql
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select to_char(date,'Mon') as mon,
extract(year from date) as yyyy,
sum("Sales") as "Sales"
from yourtable
group by 1,2
At the request of Radu, I will explain that query:
to_char(date,'Mon') as mon, : converts the "dat...
What does the explicit keyword mean?
...s with default params can also act as single arg ctor, e.g., Object( const char* name=NULL, int otype=0).
– maccullt
Sep 24 '08 at 1:23
499
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Compile time string hashing
...7b82d07L,
...
};
template<size_t idx>
constexpr uint32_t crc32(const char * str)
{
return (crc32<idx-1>(str) >> 8) ^ crc_table[(crc32<idx-1>(str) ^ str[idx]) & 0x000000FF];
}
// This is the stop-recursion function
template<>
constexpr uint32_t crc32<size_t(-...
How to read the output from git diff?
...nclude "cache.h"
#include "walker.h"
-int cmd_http_fetch(int argc, const char **argv, const char *prefix)
+int main(int argc, const char **argv)
{
+ const char *prefix;
struct walker *walker;
int commits_on_stdin = 0;
int commits;
@@ -18,6 +19,8 @@ int cmd_http_fetch...
How do I properly compare strings in C?
I am trying to get a program to let a user enter a word or character, store it, and then print it until the user types it again, exiting the program. My code looks like this:
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Use of 'const' for function parameters
...ect, thus the const at the end of its declaration)
– CharonX
Oct 1 '18 at 9:54
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show 2 more comments
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Finding current executable's path without /proc/self/exe
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Solaris: char exepath[MAXPATHLEN]; sprintf(exepath, "/proc/%d/path/a.out", getpid()); readlink(exepath, exepath, sizeof(exepath));; that's different from getexecname() - which does the equiv of pargs -x <PID> | grep AT_SUN_EXECN...
How to declare strings in C [duplicate]
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Strings in C are represented as arrays of characters.
char *p = "String";
You are declaring a pointer that points to a string stored some where in your program (modifying this string is undefined behavior) according to the C programming language 2 ed.
char p2[] =...
How to get the URL without any parameters in JavaScript?
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You can concat origin and pathname, if theres present a port such as example.com:80, that will be included as well.
location.origin + location.pathname
sha...