on GCC's handling of 'alloca' in terms of #include etc
Depending on what you do, alloca is either a proper function that you can take the address of, or inline magic
GCC  C  Linux 
2 days ago
POS04-C. Avoid using PTHREAD_MUTEX_NORMAL type mutex locks
The standard states that undefined behaviour can result from incorrect use of the functions, even if your C code is well-formed.

Other such instances of UB in POSIX exist - https://www.google.com/search?q=site:opengroup.org+%2B"undefined+behavior"
C  POSIX  concurrentProgramming 
2 days ago
Concurrency is not parallelism - The Go Blog
"concurrency is the composition of independently executing processes, while parallelism is the simultaneous execution of (possibly related) computations. Concurrency is about dealing with lots of things at once. Parallelism is about doing lots of things at once."

Links to Rob Pike's talk - https://vimeo.com/49718712 , see also https://stackoverflow.com/a/12034706/
concurrentProgramming  parallelProgramming  talks  videos 
3 days ago
.Net discourages automatic rollback, encourages explicit call in catch block
The documentation's examples for the TransactionScope class and the SqlTransaction.Rollback() method, make it clear we're encouraged to use either TransactionScope, or explicit rollback. The documentation for the DbTransaction.Dispose() method remarks that it should do a rollback, but that this shouldn't be relied upon.
exceptionHandling  databaseProgramming  StackOverflow 
3 days ago
The Magic Of TransactionScope
It uses thread-local-storage to (effectively) simulate dynamic scoping.

Does that ghastly pattern have a name?
transactionalProgramming  blogEntries 
4 days ago
Start and Stop Firebird Server [Windows]
On command line:

net start "FirebirdServerDefaultInstance"
net stop "FirebirdServerDefaultInstance"

There's also something with 'instsvc'
FirebirdSQL 
6 days ago
early and late binding in VB.Net
iff you declare a variable 'As Object', VB.Net uses late binding. Otherwise, early binding with ordinary compile-time checks.

There's more to this horror show at http://www.i-programmer.info/programming/theory/1477-late-binding-myths-and-reality.html
VB.Net 
6 days ago
Handles Clause (Visual Basic) | Microsoft Docs
For event handling. Automatically creates necesssary functor and invokes AddHandler for you. Ugh.
VB.Net 
6 days ago
Check listening ports with netstat [Linux]
`sudo netstat -plnt` to list listening TCP ports

(On Windows, `netstat -an -p TCP`)
netstat  Linux  Unix  networking 
6 days ago
Erlang -- Getting Started -- how to quit the 'erl' shell
"init:stop()." (including the '.')

They saw fit to break ctrl+c
Erlang 
7 days ago
Declarations/definitions as statements in C and C++ - Stack Overflow
Looking at this code in C and C++:

while (--x >= 0) int i;

C++ treats is at while (--x >= 0) {int i;}
C  C++  StackOverflow 
7 days ago
Handle - Windows Sysinternals
"Ever wondered which program has a particular file or directory open? Now you can find out. Handle is a utility that displays information about open handles for any process in the system."
sysinternals  Windows  WindowsUtilities 
7 days ago
git.io
GitHub's own never-mentioned URL shortener
urlShorteners  GitHub 
7 days ago
C++ Core Guideline: The Guideline Support Library - ModernesCpp.com
"it requires no C++11 conformant compiler. You can even use it in legacy code and make it a lot more memory safe and type safe."

"aim for zero-overhead when compared to equivalent hand-written checks.". That's a promise."
C++ 
19 days ago
Async support in NUnit - simoneb's blog
The discussed version of NUnit2 will automatically synchronously wait on async test methods, whereas newer versions (including later versions of 2?) do things 'properly', as apparently does XUnit https://stackoverflow.com/a/12248190/

See also https://msdn.microsoft.com/en-us/magazine/dn818493.aspx
C#  asynchronousProgramming  testing  unitTesting  blogEntries  NUnit  XUnit 
20 days ago
How fast can we *really* multiply matrices? - MathOverflow
Complexity theoretic properties tend to discount numerical stability, memory, and parallelism
matrices  algorithms  MathOverflow 
4 weeks ago
SSL Converter - Convert SSL Certificates to different formats
good openssl command listing + a really bad idea of a web service

Note the difference between PKCS12 (.PFX) and the (obsolete?) PKCS7 (.P7B)

I found that FileZilla only likes the generated PEM if we do the PKCS12->PEM conversion, *not* if we go directly from PKCS7->PEM, so go ahead and export your cert to PKCS12 (pfx) first, *then* convert using

openssl pkcs12 -in certificate.pfx -out certificate.cer -nodes

and *do not* use this command:

openssl pkcs7 -print_certs -in certificate.p7b -out certificate.cer
certificateManagement 
5 weeks ago
How do I find the .NET version? - Stack Overflow
reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP"
Windows  StackOverflow 
5 weeks ago
Using FtpWebRequest to do FTP over SSL [simple, blocking]
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://myftpserver/dir/filename");
request.Method = WebRequestMethods.Ftp.DownloadFile;
request.EnableSsl = true; // Forces use of TLS. Don't mind the name
WebResponse response = request.GetResponse();
var stream = response.GetResponseStream();
FTP  FTPS  blogEntries  C# 
5 weeks ago
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