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“Keep Me Logged In” - the best approach
My web application uses sessions to store information about the user once they've logged in, and to maintain that information as they travel from page to page within the app. In this specific application, I'm storing the user_id , first_name and last_name of the person.
...
How is the fork/join framework better than a thread pool?
...up into small evenly sized chunks in one big bang. Say dealing with a some form of hierarchy without balancing.)
Conclusion: FJ allows more efficient use of hardware threads in an uneven situations, which will be always if you have more than one thread.
...
Where do you store your salt strings?
...lt is from looking at the data. This way an attacker cannot practically perform a brute-force attack to obtain a password that matches the hash, since he doesn't know the hash to begin with and has no way to know which parts of the data are parts of the salt, or parts of the salted-password hash (un...
Floating point vs integer calculations on modern hardware
I am doing some performance critical work in C++, and we are currently using integer calculations for problems that are inherently floating point because "its faster". This causes a whole lot of annoying problems and adds a lot of annoying code.
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社交应用组件 · App Inventor 2 中文网
...tain a list of lists, where each sub-list contains a status update of the
form (username message).
IsAuthorized()
This event is raised after the program calls Authorize if the authorization was
successful. It is also called after a call to CheckAuthorized if we already have a
valid access tok...
Clang optimization levels
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
};
...
std::wstring VS std::string
...
On Linux? Almost never (§).
On Windows? Almost always (§).
On cross-platform code? Depends on your toolkit...
(§) : unless you use a toolkit/framework saying otherwise
Can std::string hold all the ASCII character set including special characters?
Notice: A std::string is suitable for holding a...
Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
Every time I mention slow performance of C++ standard library iostreams, I get met with a wave of disbelief. Yet I have profiler results showing large amounts of time spent in iostream library code (full compiler optimizations), and switching from iostreams to OS-specific I/O APIs and custom buffer...
What's the best way to communicate between view controllers?
...te (per the MVC design pattern). Usually you want to avoid putting state information inside a controller, unless it's strictly "presentation" data.
Second, see page 10 of the Stanford presentation for an example of how to programmatically push a controller onto the navigation controller. For an exa...
PHP parse/syntax errors; and how to solve them
... statements into distinct or nested if conditions.
Instead of lengthy math formulas or logic chains, use temporary variables to simplify the code. (More readable = fewer errors.)
Add newlines between:
The code you can easily identify as correct,
The parts you're unsure about,
And the lines which t...