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In what cases do I use malloc and/or new?
...st the return from void*. This potentially introduces a lot of problems:
#include <stdlib.h>
struct foo {
double d[5];
};
int main() {
foo *f1 = malloc(1); // error, no cast
foo *f2 = static_cast<foo*>(malloc(sizeof(foo)));
foo *f3 = static_cast<foo*>(malloc(1)); // No ...
How to redirect cin and cout to files?
...in the code does. I've tested it on my pc with gcc 4.6.1; it works fine.
#include <iostream>
#include <fstream>
#include <string>
void f()
{
std::string line;
while(std::getline(std::cin, line)) //input from the file in.txt
{
std::cout << line << ...
Volatile Vs Atomic [duplicate]
...cReference, provide a wider variety of operations atomically, specifically including increment for AtomicInteger.
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Could I change my name and surname in all previous commits?
...to history that has not yet been shared.
June 2018 Update
The manual now includes a solution, using --env-filter, in its examples: https://git-scm.com/docs/git-filter-branch#_examples :
git filter-branch --env-filter '
if test "$GIT_AUTHOR_EMAIL" = "root@localhost"
then
GIT_AUTH...
How to update Python?
...d from within Python(x,y) with their package manager, but updates are also included on their website. I could not find a specific reference so perhaps someone else can speak to this. Similar to ActiveState and probably Enthought, Python (x,y) clearly states it is incompatible with other installation...
SQLite - UPSERT *not* INSERT or REPLACE
...ng in any case, so I don’t have to take care of it myself.
You can also include a column on both the new and old sides and then use e.g. COALESCE(new.content, old.content) in the outer SELECT to say “insert the new content if there was any, otherwise keep the old content” – e.g. if you are ...
Incrementing in C++ - When to use x++ or ++x?
...ion where the semantic (of pre/post) doesn't matter.
example:
pre.cpp:
#include <iostream>
int main()
{
int i = 13;
i++;
for (; i < 42; i++)
{
std::cout << i << std::endl;
}
}
post.cpp:
#include <iostream>
int main()
{
int i = 13;
++i;
fo...
Remove all but numbers from NSString
...erCharacterSet to formUnionWithCharacterSet:. Note that letterCharacterSet includes marks as well, hence the use of lower- and uppercase versions.
– kadam
Sep 17 '14 at 17:10
...
Why use argparse rather than optparse?
I noticed that the Python 2.7 documentation includes yet another command-line parsing module. In addition to getopt and optparse we now have argparse .
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How to move Jenkins from one PC to another
...
While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes.
– vich
Jun 22 '17 at 15:23
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