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How large should my recv buffer be when calling recv in the socket library
...e) or an end-of-message delimiter (which might just be a newline in a text-based protocol, for example). A third, lesser-used, option is to mandate a fixed size for each message. Combinations of these options are also possible - for example, a fixed-size header that includes a length value.
SOCK_D...
What is the difference between Cygwin and MinGW?
...for Windows.
About Cygwin
The purpose of Cygwin is to make porting Unix-based applications to Windows much easier, by emulating many of the small details that Unix-based operating systems provide, and are documented by the POSIX standards. Your application can use Unix feature such as pipes, Uni...
Generating a SHA-256 hash from the Linux command line
...
For the sha256 hash in base64, use:
echo -n foo | openssl dgst -binary -sha1 | openssl base64
Example
echo -n foo | openssl dgst -binary -sha1 | openssl base64
C+7Hteo/D9vJXQ3UfzxbwnXaijM=
...
How to check SQL Server version
...t could be set to a lower compatibility.
IF EXISTS (SELECT * FROM sys.databases WHERE database_id=DB_ID() AND [compatibility_level] < 110)
RAISERROR('Database compatibility level must be SQL2008R2 or later (110)!', 16, 1)
...
In-Place Radix Sort
... 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) {
if(seqs[i][base] == 'A') {
swap(seqs[i], seqs[APos++]);
...
Unable to execute dex: GC overhead limit exceeded in Eclipse
...s
-Dosgi.requiredJavaVersion=1.6
-XX:MaxPermSize=256m
-Xms512m
-Xmx1024m
based on the answer marked as correct, changing
-XX:MaxPermSize=256m
-Xms512m
-Xmx1024m
and:
--launcher.XXMaxPermSize
1024m
share
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...
Get operating system info
...
Based on the answer by Fred-II I wanted to share my take on the getOS function, it avoids globals, merges both lists and detects the architecture (x32/x64)
/**
* @param $user_agent null
* @return string
*/
function getOS(...
Is there a code obfuscator for PHP? [closed]
...tespace($infile);
// compress data
$data=gzcompress($data,9);
// encode in base64
$data=base64_encode($data);
// generate output text
$out='<?ob_start();$a=\''.$data.'\';eval(gzuncompress(base64_decode($a)));$v=ob_get_contents();ob_end_clean();?>';
// write output text
file_put_contents($outfi...
Floating point vs integer calculations on modern hardware
...
@JohannesSchaub-litb: SSE2 (baseline for x86-64) has packed double-precision FP. With only two 64-bit doubles per register, the potential speedup is smaller than float for code that vectorizes well. Scalar float and double use XMM registers on x86-64,...
dispatch_after - GCD in Swift?
... with this answer, I had already compensated for its loss by writing a GCD-based cancelable timer (using a dispatch_source_t, because that's something you can cancel).
– matt
Dec 1 '15 at 16:43
...