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How can I output the value of an enum class in C++11
...;< together, with the error error: cannot bind ‘std::basic_ostream<char>’ lvalue to ‘std::basic_ostream<char>&&’. this appears to be because when the stream is temporary, the ADL fails, and the above template is not a possibility. any tips?
– of...
How can I pass a member function where a free function is expected?
...n<void(int, int)> fun)
{
fun(1, 1);
}
int main (int argc, const char * argv[])
{
...
aClass a;
auto fp = std::bind(&aClass::test, a, _1, _2);
function1(fp);
return 0;
}
share
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...
No visible cause for “Unexpected token ILLEGAL”
...e error is raised if, for example, you try to run a js file with a rogue @ character, a misplaced curly brace, bracket, "smart quotes", single quotes not enclosed properly (e.g. this.run('dev1)) and so on.
A lot of different situations can cause this error. But if you don't have any obvious syntax ...
Immutability of Strings in Java
...e could do something like this:
String s1 = "Hello";
String s2 = s1;
s1.setCharAt(1, 'a'); // Fictional method that sets character at a given pos in string
System.out.println(s2); // Prints "Hallo"
Edit to respond to OP's edit:
If you look at the source code for String.replace(char,char) (also ava...
How can I negate the return-value of a process?
...#include <sys/wait.h>
#include "stderr.h"
#ifndef lint
static const char sccs[] = "@(#)$Id: not.c,v 4.2 2005/06/22 19:44:07 jleffler Exp $";
#endif
int main(int argc, char **argv)
{
int pid;
int corpse;
int status;
err_setarg0(argv[0]);
...
What's the best way to check if a file exists in C?
...t; // stat
#include <stdbool.h> // bool type
bool file_exists (char *filename) {
struct stat buffer;
return (stat (filename, &buffer) == 0);
}
and call it like this:
#include <stdio.h> // printf
int main(int ac, char **av) {
if (ac != 2)
return 1;
...
Java: splitting a comma-separated string but ignoring commas in quotes
...\"comma: ,\"", all you need to do is strip off the extraneous double quote characters.
– Paul Hanbury
Nov 18 '09 at 17:41
...
Elegant Python function to convert CamelCase to snake_case?
...etHTTPResponseCode').lower()
'get_httpresponse_code'
To ignore the first character simply add look behind (?!^)
>>> re.sub('(?!^)([A-Z]+)', r'_\1','CamelCase').lower()
'camel_case'
>>> re.sub('(?!^)([A-Z]+)', r'_\1','CamelCamelCase').lower()
'camel_camel_case'
>>> re.su...
How can I catch a ctrl-c event?
...printf("Caught signal %d\n",s);
exit(1);
}
int main(int argc,char** argv)
{
struct sigaction sigIntHandler;
sigIntHandler.sa_handler = my_handler;
sigemptyset(&sigIntHandler.sa_mask);
sigIntHandler.sa_flags = 0;
sigaction(SIGINT, &sigIntHandler, NULL);
pau...
When should you not use virtual destructors?
...ays that if you were to copy from an object with POD type into an array of chars (or unsigned chars) and back again, then the result will be the same as the original object.]
Modern C++
In recent versions of C++, the concept of POD was split between the class layout and its construction, copying a...