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How do I choose between Semaphore and SemaphoreSlim?
Their public interfaces appear similar. The documentation states that the SemaphoreSlim is a lightweight alternative and doesn't use Windows Kernel semaphores. This resource states that the SemaphoreSlim is much faster. In what situations does the SemaphoreSlim make more sense over the Semaph...
When is a C++ destructor called?
...te an item in the (previously) unused part of its memory space.
Now, what happens when/if you erase an item from the vector? It can't just use delete -- that would release its entire block of memory; it needs to destroy one object in that memory without destroying any others, or releasing any of the...
Mismatched anonymous define() module
I'm getting this error when I browse my webapp for the first time (usually in a browser with disabled cache).
7 Answers
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what's data-reactid attribute in html?
...y identify its components within the DOM.
This is important because React applications can be rendered at the server as well as the client. Internally React builds up a representation of references to the DOM nodes that make up your application (simplified version is below).
{
id: '.1oqi7occu80'...
SSH to Elastic Beanstalk instance
...22 | 192.168.1.1/32
Configure the environment of your Elastic Beanstalk Application
If you haven't made a key pair yet, make one by clicking Key Pairs below Security Group in the ec2 tab.
In the AWS console, open the Elastic Beanstalk tab.
Select the relevant region.
Select relevant Environment...
Reading Properties file in Java
...load a properties file from class path, inside static method
prop.load(App.class.getClassLoader().getResourceAsStream("config.properties"));
//get the property value and print it out
System.out.println(prop.getProperty("database"));
System.out.println(prop.getProperty("dbuser"));
...
Synchronously waiting for an async operation, and why does Wait() freeze the program here
...
The ConfigureAwait(false) is the appropriate solution in this case. Since it has no need to call the callbacks in the captured context, it shouldn't. Being an API method it should handle it internally, rather than forcing all of the callers to move out of ...
await vs Task.Wait - Deadlock?
...on may execute on the waiting thread. There are situations where this can happen, but it's an optimization. There are many situations where it can't happen, like if the task is for another scheduler, or if it's already started or if it's a non-code task (such as in your code example: Wait cannot exe...
AngularJS: How to run additional code after AngularJS has rendered a template?
...ng. I'm not sure what the 'watch' function should be watching. Our angular app has various different eng- directives, which will vary from page to page, so how do I know what to 'watch'? Surely there's a simple way to fire off some code when a page has finished being rendered?
–...
JPA or JDBC, how are they different?
...* FROM USERS, etc. Data sets can be returned which you can handle in your app, and you can do all the usual things like INSERT, DELETE, run stored procedures, etc. It is one of the underlying technologies behind most Java database access (including JPA providers).
One of the issues with tradition...