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What is ActiveMQ used for - can we apply messaging concept using a Database?
...nicate between two distributed processes.
Yes, you could store messages in a Database to communicate between two processes, but, as soon as the message is received you'd have to DELETE the message, That means a row INSERT and DELETE for each message.
When you try to scale that up communicating th...
Using arrays or std::vectors in C++, what's the performance gap?
In our C++ course they suggest not to use C++ arrays on new projects anymore. As far as I know Stroustroup himself suggests not to use arrays. But are there significant performance differences?
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How to pause / sleep thread or process in Android?
I want to make a pause between two lines of code, Let me explain a bit:
12 Answers
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What is the quickest way to HTTP GET in Python?
What is the quickest way to HTTP GET in Python if I know the content will be a string? I am searching the documentation for a quick one-liner like:
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POST request via RestTemplate in JSON
I didn't find any example how to solve my problem, so I want to ask you for help. I can't simply send POST request using RestTemplate object in JSON
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Re-enabling window.alert in Chrome
I accidently checked the "disable alerts from this site" box in Chrome, and now I cannot get any window.alert to work on my localhost.
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Comparing Java enum members: == or equals()?
...with private constructors and a bunch of public static members. When comparing two members of a given enum, I've always used .equals() , e.g.
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Are Java static initializers thread safe?
I'm using a static code block to initialize some controllers in a registry I have. My question is therefore, can I guarantee that this static code block will only absolutely be called once when the class is first loaded? I understand I cannot guarantee when this code block will be called, I'm guessi...
Best approach to remove time part of datetime in SQL Server
Which method provides the best performance when removing the time portion from a datetime field in SQL Server?
23 Answers
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How to keep one variable constant with other one changing with row in excel
Lets say I have one cell A1, which I want to keep constant in a calculation. For example, I want to calculate a value like this:
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