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Initializing a struct to 0
...so just declare it myStruct _m;
If the data is a local variable or a heap-allocated zone, clear it with memset like:
memset(&m, 0, sizeof(myStruct));
Current compilers (e.g. recent versions of gcc) optimize that quite well in practice. This works only if all zero values (include null pointer...
How to check if running in Cygwin, Mac or Linux?
...LAGS += -DNDEBUG
endif
ifeq ($(uname_S),GNU/kFreeBSD)
CFLAGS += -D_BSD_ALLOC
endif
ifeq ($(uname_S),UnixWare)
CFLAGS += -Wextra
endif
...
See also this complete answer about uname -s and Makefile.
The correspondence table in the bottom of this answer is from Wikipedia article about uname. P...
What is database pooling?
...e connections to multiple servers and multiple user accounts, they may pre-allocate some baseline of connections so some are ready immediately, and they may actually close old connections when the usage pattern quietens down.
...
Why are Where and Select outperforming just Select?
...reating a LINQ expression is cheap. Calling delegate functions is cheap. Allocating and looping over an iterator is cheap. But it's even cheaper to not do these things. Thus, if you find that a LINQ statement is the bottleneck in your program, in my experience rewriting it without LINQ will alwa...
Tuples( or arrays ) as Dictionary keys in C#
...s are value types (structs), not reference types, so they avoid the memory allocation and garbage collection costs. Also, they offer conciser and more intuitive syntax, allowing for their fields to be named if you so wish. They also implement the IEquatable<T> interface needed for the dictiona...
smart pointers (boost) explained
...neither transferable nor sharable. It's just usable if you locally need to allocate memory, but be sure it's freed again when it goes out of scope. But it can still be swapped with another scoped_ptr, if you wish to do so.
shared_ptr is a smart pointer that shares ownership (third kind above). It ...
Python: Is it bad form to raise exceptions within __init__?
...n't been properly initialized. Actually it's a very common idiom in C++ to allocate resources in the constructor and deallocate them in the destructor. You suggest that the member object destroys itself (deallocating the resources in its destructor) - then the same issue arises when writing the memb...
SSL certificate rejected trying to access GitHub over HTTPS behind firewall
...test it works by ssh-ing to gitproxy
pti@pti-laptop:~$ ssh github.com
PTY allocation request failed on channel 0
Hi ptillemans! You've successfully authenticated, but GitHub does not provide shell access.
Connection to github.com closed.
pti@pti-laptop:~$
(Note: if you never logged in to g...
Multiple github accounts on the same computer?
...user settings overridden accordingly:
Setting user name, email and GitHub token – Overriding settings for individual repos
https://help.github.com/articles/setting-your-commit-email-address-in-git/
Hope this helps.
Note:
Some of you may require different emails to be used for different reposito...
Finalize vs Dispose
...uarantee that a finalizer will execute at all on any given instance.
Never allocate memory in finalizers or call virtual methods from finalizers.
Avoid synchronization and raising unhandled exceptions in the finalizers.
The execution order of finalizers is non-deterministic—in other words, you can...