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Volatile Vs Atomic [duplicate]
... on that variable is atomic.
Notably, however, an operation that requires more than one read/write -- such as i++, which is equivalent to i = i + 1, which does one read and one write -- is not atomic, since another thread may write to i between the read and the write.
The Atomic classes, like Atom...
What does “./bin/www” do in Express 4.x?
...art script in your package.json, heroku will automatically uses that, read more here
"scripts": {
"start": "node ./bin/www",
}
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Port 80 is being used by SYSTEM (PID 4), what is that?
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display: inline-block extra margin [duplicate]
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What are the use-cases for Web Workers? [closed]
...age that something is being recomputed but you can change other #s. Change more #s. When done changing, wait till status changes to "all calculations complete, you can now review the final #s and save".
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Stack, Static, and Heap in C++
...p allocations (dynamically allocated memory) is useful when you want to be more flexible than the above. Frequently, a function gets called to respond to an event (the user clicks the "create box" button). The proper response may require allocating a new object (a new Box object) that should stick a...
Two single-column indexes vs one two-column index in MySQL?
... queries using either or both of the columns fast, but of course uses also more disk space.
When choosing the indexes, you also need to consider the effect on inserting, deleting and updating. More indexes = slower updates.
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ASP.NET: This method cannot be called during the application's pre-start initialization stage
...ones who ask why, it is a known issue described in the mvc 3 release notes
More details here
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Scala: What is the difference between Traversable and Iterable traits in Scala collections?
...ly iterate when using just foreach.
From one perspective, Iterable is the more demanding/powerful trait, as you can easily implement foreach using iterator, but you can't really implement iterator using foreach.
In summary, Iterable provides a way to pause, resume, or stop iteration via a statef...
Mediator Vs Observer Object-Oriented Design Patterns
...urce: dofactory
Example:
The observer pattern:
Class A, can have zero or more observers of type O registered with it. When something in A is changed it notifies all of the observers.
The mediator pattern:
You have some number of instances of class X (or maybe even several different types:X, Y &am...