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WPF Data Binding and Validation Rules Best Practices
...plex.com), which includes a demo of best practices validation in WPF+MVVM, and uses IDataErrorInfo
– Mark Heath
Sep 4 '09 at 6:37
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Best practices for SQL varchar column length [closed]
...t into it, not the max length you define. So from a storage point of view (and most probably a performance one as well), it does not make any difference whether you declare a column as VARCHAR(100) or VARCHAR(500).
You should see the max length provided for a VARCHAR column as a kind of constraint...
What is a Y-combinator? [closed]
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@Andre MacFie: I didn't comment on the effort, I commented on the quality. In general, the policy on Stack Overflow is that answers should be self contained, with links to more information.
– Jørgen Fogh...
What happens if a Android Service is started multiple times?
... in one instance. However, everytime you start the service, the onStartCommand() method is called.
This is documented here
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EC2 Can't resize volume after increasing size
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Thank you Wilman your commands worked correctly, small improvement need to be considered if we are increasing EBSs into larger sizes
Stop the instance
Create a snapshot from the volume
Create a new volume based on the snapshot increasing the size
Ch...
How to make the window full screen with Javascript (stretching all over the screen)
...owser go fullscreen using JavaScript, in a way that works with IE, Firefox and Opera?
19 Answers
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What's the difference between SoftReference and WeakReference in Java?
What's the difference between java.lang.ref.WeakReference and java.lang.ref.SoftReference ?
12 Answers
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Chrome desktop notification example [closed]
...sktop notifications - simple to trigger, work as long as the page is open, and may disappear automatically after a few seconds
Service Worker notifications - a bit more complicated, but they can work in the background (even after the page is closed), are persistent, and support action buttons
The ...
Eclipse does not highlight matching variables
...gt; Text Editors > Annotations
Compare the settings for 'Occurrences' and 'Write Occurrences'
Make sure that you don't have the 'Text as higlighted' option checked for one of them.
This should fix it.
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What is the most efficient/elegant way to parse a flat table into a tree?
..., we can say that all popular SQL databases support recursive queries in standard syntax.
WITH RECURSIVE MyTree AS (
SELECT * FROM MyTable WHERE ParentId IS NULL
UNION ALL
SELECT m.* FROM MyTABLE AS m JOIN MyTree AS t ON m.ParentId = t.Id
)
SELECT * FROM MyTree;
I tested recursive que...