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Why does python use 'else' after for and while loops?
I understand how this construct works:
21 Answers
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What are file descriptors, explained in simple terms?
... open a file, the operating system creates an entry to represent that file and store the information about that opened file. So if there are 100 files opened in your OS then there will be 100 entries in OS (somewhere in kernel). These entries are represented by integers like (...100, 101, 102....). ...
Debug vs. Release performance
...ly true. In debug mode, the compiler emits debug symbols for all variables and compiles the code as is. In release mode, some optimizations are included:
unused variables do not get compiled at all
some loop variables are taken out of the loop by the compiler if they are proven to be invariants
cod...
Do htmlspecialchars and mysql_real_escape_string keep my PHP code safe from injection?
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When it comes to database queries, always try and use prepared parameterised queries. The mysqli and PDO libraries support this. This is infinitely safer than using escaping functions such as mysql_real_escape_string.
Yes, mysql_real_escape_string is effectively just a ...
What are the obj and bin folders (created by Visual Studio) used for?
I created a new project in Visual Studio 2010 and noticed that there are now two new folders named obj and bin in my project directory.
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What is the difference between “screen” and “only screen” in media queries?
What is the difference between screen and only screen in media queries?
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Can I Install Laravel without using Composer?
...ing Composer is easy, it's just a matter of getting the composer.phar file and running commands on it.
You do not need to run Composer on your server as well as locally, once you run composer install or composer update your project will have all its dependencies available and you can just upload it...
What is the difference between HTTP status code 200 (cache) vs status code 304?
... cache them (e.g. future-dated Expires or Cache-Control: max-age headers), and that at the time you triggered the new request, those cached objects were still stored in local cache and had not yet expired.
304s, on the other hand, are the response of the server after the browser has checked if a fi...
Is there a standard sign function (signum, sgn) in C/C++?
I want a function that returns -1 for negative numbers and +1 for positive numbers.
http://en.wikipedia.org/wiki/Sign_function
It's easy enough to write my own, but it seems like something that ought to be in a standard library somewhere.
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How do you use bcrypt for hashing passwords in PHP?
Every now and then I hear the advice "Use bcrypt for storing passwords in PHP, bcrypt rules".
11 Answers
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