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Practical uses for AtomicInteger
...ementAndGet(), etc) that can be used by many threads concurrently
As a primitive that supports compare-and-swap instruction (compareAndSet()) to implement non-blocking algorithms.
Here is an example of non-blocking random number generator from Brian Göetz's Java Concurrency In Practice:
public c...
Javascript infamous Loop issue? [duplicate]
...nd that's what the inner function 'sees'.
In the second example, for each iteration step the outer function literal will evaluate to a new function object with its own scope and local variable num, whose value is set to the current value of i. As num is never modified, it will stay constant over th...
Explode PHP string by new line
...roblems when moving from one system to another when you use the constants with data stored on another system. The new system's constants might be different from the previous system's and the stored data might not work anymore. So completely parse your data before storing it to remove any system depe...
Determine which element the mouse pointer is on top of in JavaScript
...'s a really cool function called document.elementFromPoint which does what it sounds like.
What we need is to find the x and y coords of the mouse and then call it using those values:
var x = event.clientX, y = event.clientY,
elementMouseIsOver = document.elementFromPoint(x, y);
document.ele...
How to set ViewBag properties for all Views without using a base class for Controllers?
..., onto ViewData/ViewBag in a global fashion by having all Controllers inherit from a common base controller.
8 Answers
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What is the purpose of std::make_pair vs the constructor of std::pair?
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The difference is that with std::pair you need to specify the types of both elements, whereas std::make_pair will create a pair with the type of the elements that are passed to it, without you needing to tell it. That's what I could gather from vari...
The ALTER TABLE statement conflicted with the FOREIGN KEY constraint
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It occurred because you tried to create a foreign key from tblDomare.PersNR to tblBana.BanNR but/and the values in tblDomare.PersNR didn't match with any of the values in tblBana.BanNR. You cannot create a relation which viol...
How Pony (ORM) does its tricks?
...--+--------------+-------+---------
1 |john@example.com |*** |John Smith |USA |address 1
2 |matthew@example.com|*** |Matthew Reed |USA |address 2
4 |rebecca@example.com|*** |Rebecca Lawson|USA |address 4
The select() function accepts a python generator as argument, and t...
How do you change the datatype of a column in SQL Server?
...BLE TableName
ALTER COLUMN ColumnName NVARCHAR(200) [NULL | NOT NULL]
EDIT
As noted NULL/NOT NULL should have been specified, see Rob's answer as well.
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How to implement static class member functions in *.cpp file?
Is it possible to implement static class member functions in *.cpp file instead of doing
it in the header file ?
8 Answer...