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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 can I upload files asynchronously?
...l jQuery not to process data or worry about content-type
// You *must* include these options!
cache: false,
contentType: false,
processData: false,
// Custom XMLHttpRequest
xhr: function () {
var myXhr = $.ajaxSettings.xhr();
if (myXhr.upload) {
// For ha...
Volatile Vs Atomic [duplicate]
...cReference, provide a wider variety of operations atomically, specifically including increment for AtomicInteger.
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Could I change my name and surname in all previous commits?
...to history that has not yet been shared.
June 2018 Update
The manual now includes a solution, using --env-filter, in its examples: https://git-scm.com/docs/git-filter-branch#_examples :
git filter-branch --env-filter '
if test "$GIT_AUTHOR_EMAIL" = "root@localhost"
then
GIT_AUTH...
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 .
...
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...
Jackson serialization: ignore empty values (or null)
... the wrong place - it needs to be on the class, not the field. i.e:
@JsonInclude(Include.NON_NULL) //or Include.NON_EMPTY, if that fits your use case
public static class Request {
// ...
}
As noted in comments, in versions below 2.x the syntax for this annotation is:
@JsonSerialize(include ...
Count character occurrences in a string in C++
...
#include <algorithm>
std::string s = "a_b_c";
size_t n = std::count(s.begin(), s.end(), '_');
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What is a “translation unit” in C++
...rce file,
plus the contents of any header files
directly or indirectly included by it,
minus those lines that were ignored
using conditional preprocessing
statements.
A single translation unit can be
compiled into an object file, library,
or executable program.
The notion of ...
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...