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Two single-column indexes vs one two-column index in MySQL?
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answered Feb 28 '10 at 2:32
Mark ByersMark Byers
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Chrome doesn't delete session cookies
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226
This can be caused by having Chrome set to Continue where you left off.
Further reading
Bug ...
Is file append atomic in UNIX?
...he size of 'PIPE_BUF' is supposed to be atomic. That should be at least 512 bytes, though it could easily be larger (linux seems to have it set to 4096).
This assume that you're talking all fully POSIX-compliant components. For instance, this isn't true on NFS.
But assuming you write to a log fi...
How to shuffle a std::vector?
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203
From C++11 onwards, you should prefer:
#include <algorithm>
#include <random>
au...
In-Place Radix Sort
...d easily be translated to some other language. It's in-place but requires 2 * seq.length passes through the array.
void radixSort(string[] seqs, size_t base = 0) {
if(seqs.length == 0)
return;
size_t TPos = seqs.length, APos = 0;
size_t i = 0;
while(i < TPos) {
i...
How many socket connections can a web server handle?
...n a single Unix flavoured OS machine - https://blog.whatsapp.com/index.php/2012/01/1-million-is-so-2011/.
And finally, this one, http://highscalability.com/blog/2013/5/13/the-secret-to-10-million-concurrent-connections-the-kernel-i.html, goes into a lot of detail, exploring how even 10 million could...
How can I use Async with ForEach?
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182
List<T>.ForEach doesn't play particularly well with async (neither does LINQ-to-objects, f...
Gradients on UIView and UILabels On iPhone [duplicate]
...ndall Helmstetter GelnerKendall Helmstetter Gelner
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Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'mscorlib
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262
Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly msco...
Java 8 Streams - collect vs reduce
...n would do a great deal of string copying, and the run
time would be O(n^2) in the number of characters. A more performant
approach would be to accumulate the results into a StringBuilder,
which is a mutable container for accumulating strings. We can use the
same technique to parallelize mut...