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What is a dependency property?
... rather than simply using a backing field to store their value, they use some helper methods on DependencyObject.
The nicest thing about them is that they have all the plumbing for data binding built in. If you bind something to them, they'll notify it when they change.
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Asynchronously wait for Task to complete with timeout
I want to wait for a Task<T> to complete with some special rules:
If it hasn't completed after X milliseconds, I want to display a message to the user.
And if it hasn't completed after Y milliseconds, I want to automatically request cancellation .
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Select rows which are not present in other table
...r:
What is easier to read in EXISTS subqueries?
LEFT JOIN / IS NULL
Sometimes this is fastest. Often shortest. Often results in the same query plan as NOT EXISTS.
SELECT l.ip
FROM login_log l
LEFT JOIN ip_location i USING (ip) -- short for: ON i.ip = l.ip
WHERE i.ip IS NULL;
EXCEPT
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Why does overflow:hidden not work in a ?
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Here is the same problem.
You need to set table-layout:fixed and a suitable width on the table element, as well as overflow:hidden and white-space: nowrap on the table cells.
Examples
Fixed width columns
The width of the table has to be t...
A simple command line to download a remote maven2 artifact to the local repository?
...his library doesn't use maven to build their applications, but is likely somewhat familiar with maven and probably has it installed.
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Reading Xml with XmlReader in C#
I'm trying to read the following Xml document as fast as I can and let additional classes manage the reading of each sub block.
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Difference between acceptance test and functional test?
...tion activity; did we build a correctly working product? Does the software meet the business requirements?
For this type of testing we have test cases that cover all the possible scenarios we can think of, even if that scenario is unlikely to exist "in the real world". When doing this type of test...
CSS: Truncate table cells, but fit as much as possible
Meet Fred. He's a table:
18 Answers
18
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Make WPF window draggable, no matter what element is clicked
... form from any control, you could probably use PreviewMouseDown, start a timer to begin the drag operation, and cancel the operation if the MouseUp event fires within X milliseconds.
share
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improve...
Python Pandas merge only certain columns
Is it possible to only merge some columns? I have a DataFrame df1 with columns x, y, z, and df2 with columns x, a ,b, c, d, e, f, etc.
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