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How to unset a JavaScript variable?
...hout var, g_b is a property
delete g_b; //return true
console.log(g_b); //error, g_b is not defined
Technical Explanation
1. Using var
In this case the reference g_a is created in what the ECMAScript spec calls "VariableEnvironment" that is attached to the current scope - this may be the a functio...
When do you use Java's @Override annotation and why?
... context) {
return true;
}
This change will not cause any compile time errors or warnings - but it completely changes the intended behavior of the subclass.
To answer your question: you should use the @Override annotation if the lack of a method with the same signature in a superclass is indic...
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
... ...
multi-layer perceptron (MLP) architecture: criteria for choosing number of hidden layers and size of
...ncrease as needed, based on test results) your training and generalization error will both be high caused by bias and underfitting.
Then increase the number of nodes in the hidden layer, one at a time, until the generalization error begins to increase, this time due to overfitting and high variance...
Error executing command 'ant' on Mac OS X 10.9 Mavericks when building for Android with PhoneGap/Cor
...
The error message proved to be true as Apache Ant isn't in the path of Mac OS X Mavericks anymore.
Bulletproof solution:
Download and install Homebrew by executing following command in terminal:
ruby -e "$(curl -fsSL https...
How do I find where an exception was thrown in C++?
...location of the exception.
Note: I say may because C++ supports non-local error handling through the use of language constructs to separate error handling and reporting code from ordinary code. The catch block can be, and often is, located in a different function/method than the point of throwing....
NGINX: upstream timed out (110: Connection timed out) while reading response header from upstream
... of data for about 25K users and returns it from Riak to the app, I get an error in the Nginx log:
11 Answers
...
How to fix: Handler “PageHandlerFactory-Integrated” has a bad module “ManagedPipelineHandler” in its
...roject to work on a local install of IIS and came across the following 500 error:
19 Answers
...
Eclipse - no Java (JRE) / (JDK) … no virtual machine
...ter - I have run it before with no problems, but now I keep getting this error:
34 Answers
...
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...