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How to find list of possible words from a letter matrix [Boggle Solver]
...aster; it turns out to use regular-expression matching instead of a set of characters. Doing the same in Python about doubles the speed.
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What should I do if two libraries provide a function with the same name generating a conflict?
...able in proper context, for example,
int (*alternative_server_init)(int, char **, char **);
Like Ferruccio stated in https://stackoverflow.com/a/678453/1635364 ,
load explicitly the library you want to use by executing (pick your favourite flags)
void* dlhandle;
void* sym;
dlhandle = dlopen("/...
Clean code to printf size_t in C++ (or: Nearest equivalent of C99's %z in C++)
...retty one..
template< class T >
struct GetPrintfID
{
static const char* id;
};
template< class T >
const char* GetPrintfID< T >::id = "%u";
template<>
struct GetPrintfID< unsigned long long > //or whatever the 64bit unsigned is called..
{
static const char* id;
...
What is the difference between #include and #include “filename”?
...ation-defined manner". See answer from piCookie.
– Richard Corden
Sep 17 '08 at 13:41
63
While yo...
Rearrange columns using cut
...made up of
one
range, or many ranges separated by commas. Selected input is written
in the same order that it is read, and is written exactly once.
It reaches field 1 first, so that is printed, followed by field 2.
Use awk instead:
awk '{ print $2 " " $1}' file.txt
...
C read file line by line
...stdio.h>
#include <stdlib.h>
int main(void)
{
FILE * fp;
char * line = NULL;
size_t len = 0;
ssize_t read;
fp = fopen("/etc/motd", "r");
if (fp == NULL)
exit(EXIT_FAILURE);
while ((read = getline(&line, &len, fp)) != -1) {
printf("Retri...
Converting any string into camel case
...elcase/5 . Care to contribute a version that can handle (remove) non-alpha chars? camelize("Let's Do It!") === "let'SDoIt!" sad face. I'll try myself but fear I will just add another replace.
– Orwellophile
May 19 '15 at 7:22
...
Difference between malloc and calloc?
...ngful. Also note that calloc doesn't necessarily do what you think for non-char types. Nobody really uses trap representations any more, or non-IEEE floats, but that's no excuse for thinking your code is truly portable when it isn't.
– Steve Jessop
Oct 8 '09 at...
How to list files in a directory in a C program?
... function to print the content of a given folder */
void show_dir_content(char * path)
{
DIR * d = opendir(path); // open the path
if(d==NULL) return; // if was not able return
struct dirent * dir; // for the directory entries
while ((dir = readdir(d)) != NULL) // if we were able to read so...
Assign one struct to another in C
...ment is supported for structs. However, there are problems:
struct S {
char * p;
};
struct S s1, s2;
s1.p = malloc(100);
s2 = s1;
Now the pointers of both structs point to the same block of memory - the compiler does not copy the pointed to data. It is now difficult to know which struct insta...