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Fastest way to check if a file exist using standard C++/C++11/C?
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Well I threw together a test program that ran each of these methods 100,000 times, half on files that existed and half on files that didn't.
#include <sys/stat.h>
#include <unistd.h>
#include <string>
#include <fstream>
inline bool exists_test0 (const std::string&...
What is the difference between an expression and a statement in Python?
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Sven MarnachSven Marnach
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Does Firefox support position: relative on table elements?
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<tbody>
<tr>
<td style="width: 100px; height: 100px; background-color: red; position: relative">
<div style="width: 10px; height: 10px; background-color: green; position: absolute; top: 10px; right: 10px"></div>
&...
Does JavaScript have a built in stringbuilder class?
..."join".
In IE8, both return about equal results.
In IE7, "join" is about 100 times faster unfortunately.
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What's the difference between StaticResource and DynamicResource in WPF?
...rosoft.com/winfx/2006/xaml"
Title="ConflictingStyleWindow" Height="100" Width="100">
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Styles/ConflictingStyle.xaml" />...
Caveats of select/poll vs. epoll reactors in Twisted
...ghest numbered file descriptor you pass it. If you select on a single fd, 100, then that's roughly twice as expensive as selecting on a single fd, 50. Adding more fds below the highest isn't quite free, so it's a little more complicated than this in practice, but this is a good first approximation...
Center Oversized Image in Div
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Why not use -100% for top/right/bottom/left? With that the container could have literally any width.
– Simon
Jun 17 '14 at 10:03
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How do you do natural logs (e.g. “ln()”) with numpy in Python?
... and log-k is the log in base k, e.g.
here k = e
l = np.log(x) / np.log(100)
and l is the log-base-100 of x
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html onchange event not working
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Add this to your page initialization:
setInterval(lookForCityChange, 100);
Then define a lookForCityChange() function:
function lookForCityChange()
{
var newCity = document.getElementById("city").value;
if (newCity != city) {
city = newCity;
doSomething(city); //...
What is the difference between require() and library()?
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100
In addition to the good advice already given, I would add this:
It is probably best to avoid ...