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How fast is D compared to C++?
...But still runs more than 3 times as long. @Matthieu M. I would not mind to test a program with boundschecking in slow motion and once it is debugged let it do its computations without boundschecking. (I do the same with C++ now.)
– Lars
Feb 28 '11 at 21:59
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How do I seed a random class to avoid getting duplicate random values [duplicate]
...tes a sequence of numbers that adequately satisfies statistical randomness tests. Since the algorithm is deterministic, the algorithm will always generate the exact same sequence of numbers if it's initialized with the same seed. That's why system time (something that changes all the time) is usuall...
BSS段、数据段、代码段、堆与栈 剖析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...化，因此造成了上述情况。
【例二】
编译如下程序（test.cpp）：
#include <stdio.h>
#define LEN 1002000
int inbss[LEN];
float fA;
int indata[LEN]={1,2,3,4,5,6,7,8,9};
double dbB = 100.0;
const int cst = 100;
int main(void)
{
int run[100] = {1,2,3,4,5,6,7,8,9};
...
IEnumerable to string [duplicate]
...
Edited for the release of .Net Core 2.1
Repeating the test for the release of .Net Core 2.1, I get results like this
1000000 iterations of "Concat" took 842ms.
1000000 iterations of "new String" took 1009ms.
1000000 iterations of "sb" took 902ms.
In short, if you are using .Ne...
How to check a not-defined variable in JavaScript
...cript 5, which was released in 2009. You can now safely use === and !== to test for undefined without using typeof as undefined has been read-only for some time.
If you want to know if a member exists independent but don't care what its value is:
if ('membername' in object) // With inheritance
if ...
How to run Selenium WebDriver test cases in Chrome?
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Outdated again on 23 March. Unable to use on the latest Chrome.
– willem
Mar 23 '17 at 9:20
add a comment
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#ifdef replacement in the Swift language
... usual, you can set a different value when in Debug or when in Release.
I tested it in real code and it works; it doesn't seem to be recognized in a playground though.
You can read my original post here.
IMPORTANT NOTE: -DDEBUG=1 doesn't work. Only -D DEBUG works. Seems compiler is ignoring a f...
Detect changes in the DOM
...l = document.documentElement;
var remain = 3;
// callback for the tests
function decide() {
if (support.DOMNodeInserted) {
window.addEventListener("DOMContentLoaded", function () {
if (support.DOMSubtreeModified) { // for FF 3+, Chrome
...
Checking for a dirty index or untracked files with Git
...s
My first thought is to just check whether these commands have output:
test -z "$(git ls-files --others)"
If it exits with 0 then there are no untracked files. If it exits with 1 then there are untracked files.
There is a small chance that this will translate abnormal exits from git ls-file...
How to escape double quotes in a title attribute
... Yep. <a href="#" title="Foo &quot;Bar&quot;">Testing</a> and <a href="#" title="Smart quotes &#8221;Bar&#8220;">Testing too</a> work for me.
– Olly Hodgson
Sep 20 '10 at 15:17
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