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ActionController::InvalidAuthenticityToken
Below is an error, caused by a form in my Rails application:
24 Answers
24
...
std::string formatting like sprintf
... ) + 1; // Extra space for '\0'
if( size <= 0 ){ throw std::runtime_error( "Error during formatting." ); }
std::unique_ptr<char[]> buf( new char[ size ] );
snprintf( buf.get(), size, format.c_str(), args ... );
return std::string( buf.get(), buf.get() + size - 1 ); // We do...
Difference between binary semaphore and mutex
... to semGive a mutex currently held by Task A, Task B's call will return an error and fail.
Mutexes always use the following sequence:
- SemTake
- Critical Section
- SemGive
Here is a simple example:
Thread A Thread B
Take Mutex
access data
... ...
Phase • Animations made easy! - Extensions - Kodular Community
...eSvVWMKMOxG1Hi82M4qOCNQ/view?usp=sharing
Let me know if you find any bugs/errors. Also, I’m open to suggestions and feature requests.
127 Likes
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Difference between .success() and .complete()?
...ery 1.5, all jQuery's AJAX methods return a jqXHR object that provides .error() , .success() , and .complete() methods.
...
Globally catch exceptions in a WPF application?
...ise continue program execution as if nothing happened (kinda like VB's On Error Resume Next ).
6 Answers
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What is the use case of noop [:] in bash?
...o" != "1" ]
then
#echo Success
fi
Which causes bash to give a syntax error:
line 4: syntax error near unexpected token `fi'
line 4: `fi'
Bash can't have empty blocks (WTF). So you add a no-op:
if [ "$foo" != "1" ]
then
#echo Success
:
fi
or you can use the no-op to comment out...
Make sure only a single instance of a program is running
...cntl.LOCK_EX | fcntl.LOCK_NB)
already_running = False
except IOError:
already_running = True
return already_running
A lot like S.Lott's suggestion, but with the code.
share
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How can I configure Logback to log different levels for a logger to different destinations?
...ngs with Logback filters. The below configuration will only print warn and error messages to stderr, and everything else to stdout.
logback.xml
<appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
<target>System.out</target>
<filter class="com.foo.StdOutFil...
How to convert floats to human-readable fractions?
...x that will fit in maxden */
/* first try zero */
printf("%ld/%ld, error = %e\n", m[0][0], m[1][0],
startx - ((double) m[0][0] / (double) m[1][0]));
/* now try other possibility */
ai = (maxden - m[1][1]) / m[1][0];
m[0][0] = m[0][0] * ai + m[0][1];
m[1][0] = m[1]...