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How does Rails keep track of which migrations have run for a database?
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Rails creates a table in your database called schema_migrations to keep track of which migrations have run.
The table contains a single column, version. When Rails runs a migration, it takes the leading digits in the migration's file name and inserts a row f...
AJAX in Chrome sending OPTIONS instead of GET/POST/PUT/DELETE?
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Based on the fact that the request isn't sent on the default port 80/443 this Ajax call is automatically considered a cross-origin resource (CORS) request, which in other words means that the request automatically issues an O...
When to use setAttribute vs .attribute= in JavaScript?
... don't really feel I understand this yet.
– temporary_user_name
Oct 24 '13 at 21:48
1
@Aerovistae...
How can I detect if the user is on localhost in PHP?
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You can also use $_SERVER['REMOTE_ADDR'] for which IP address of the client requesting is given by the web server.
$whitelist = array(
'127.0.0.1',
'::1'
);
if(!in_array($_SERVER['REMOTE_ADDR'], $whitelist)){
// not valid
}
...
How do you make a HTTP request with C++?
..., libcurl, curlpp, urdl, boost::asio and considered Qt (but turned it down based on the license). All of these were either incomplete for this use, had sloppy interfaces, had poor documentation, were unmaintained or didn't support https.
Then, at the suggestion of https://stackoverflow.com/a/101257...
How can I troubleshoot my Perl CGI script?
...ironment)
is considered tainted. Environment variables such as PATH and
LD_LIBRARY_PATH
are particularly troublesome. You have to set these to a safe value
or unset them completely, as I recommend. You should be using absolute
paths anyway. If taint checking complains about something else,
make ...
Concatenating two lists - difference between '+=' and extend()
... function call, which is slightly more expensive in Python than the INPLACE_ADD.
It's really nothing you should be worrying about, unless you're performing this operation billions of times. It is likely, however, that the bottleneck would lie some place else.
...
How to check if a process id (PID) exists
...condition.
If you want to ignore the text output of kill and do something based on the exit code, you can
if ! kill $pid > /dev/null 2>&1; then
echo "Could not send SIGTERM to process $pid" >&2
fi
sha...
How to concatenate and minify multiple CSS and JavaScript files with Grunt.js (0.3.x)
...g the order from the specified source files configured. While RequireJS is based on dependency. Different approach yet can achieve the same result.
– priyabagus
Aug 23 '17 at 0:30
...
difference between fork and branch on github
... github. Do I fork all the branches? How do I know which branch my fork is based on? In other words which branch will be downloaded to my PC?
...