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Fastest way to check if a file exist using standard C++/C++11/C?
...>
#include <fstream>
inline bool exists_test0 (const std::string& name) {
ifstream f(name.c_str());
return f.good();
}
inline bool exists_test1 (const std::string& name) {
if (FILE *file = fopen(name.c_str(), "r")) {
fclose(file);
return true;
} els...
How can I have Github on my own server?
...Github that is for your own local server? I am curious if there is like a PHP script or even a desktop client that mimics Github's functionality, I love Github but it would be nice to host on my own server.
...
Measuring execution time of a function in C++
...
template<typename F, typename... Args>
double funcTime(F func, Args&&... args){
TimeVar t1=timeNow();
func(std::forward<Args>(args)...);
return duration(timeNow()-t1);
}
Example usage:
#include <iostream>
#include <algorithm>
typedef std::string Strin...
Run JavaScript code on window close or page refresh?
...load", logData, false);
function logData() {
navigator.sendBeacon("/log.php", analyticsData);
}
sendBeacon() is supported in:
Edge 14
Firefox 31
Chrome 39
Safari 11.1
Opera 26
iOS Safari 11.4
It is NOT currently supported in:
Internet Explorer
Opera Mini
Here is a polyfill for sendBeaco...
How can I propagate exceptions between threads?
...d::rethrow_exception(teptr);
}
catch(const std::exception &ex)
{
std::cerr << "Thread exited with exception: " << ex.what() << "\n";
}
}
return 0;
}
Because in your case you have multiple worker threads, you will need to ke...
How do you get a string to a character array in JavaScript?
...: 12.2.5 Array Initializer
spread is also referenced as "splat" (e.g. in PHP or Ruby or as "scatter" (e.g. in Python).
Demo
Try before buy
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How to sort an array in Bash
I have an array in Bash, for example:
16 Answers
16
...
How does Google's Page Speed lossless image compression work?
...{} \;
You can add -m[%] to jpegoptim to lossy compress JPG images, for example:
find /path/to/jpgs/ -type f -name "*.jpg" -exec jpegoptim -m70 --strip-all {} \;
To optimize all PNGs in a directory:
find /path/to/pngs/ -type f -name "*.png" -exec optipng -o2 {} \;
-o2 is the default optimiza...
What does template mean?
...m other object files and whose address is unique in the entire program). Examples:
Template type parameter:
template<typename T>
struct Container {
T t;
};
// pass type "long" as argument.
Container<long> test;
Template integer parameter:
template<unsigned int S>
struct V...
Representing graphs (data structure) in Python
...f._graph[node2].add(node1)
def remove(self, node):
""" Remove all references to node """
for n, cxns in self._graph.items(): # python3: items(); python2: iteritems()
try:
cxns.remove(node)
except KeyError:
pass
tr...