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What is causing ERROR: there is no unique constraint matching given keys for referenced table?
...atching given keys for referenced table, and having stared at it for while now I can't figure out why this error arises in this situation.
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How much overhead does SSL impose?
I know there's no single hard-and-fast answer, but is there a generic order-of-magnitude estimate approximation for the encryption overhead of SSL versus unencrypted socket communication? I'm talking only about the comm processing and wire time, not counting application-level processing.
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Why JSF saves the state of UI components on server?
Now, it is no longer necessary to save state while using JSF. A high performance Stateless JSF implementation is available for use. See this blog & this question for relevant details & discussion. Also, there is an open issue to include in JSF specs, an option to provide stateless mode for JSF...
How to get result of console.trace() as string in javascript with chrome or firefox?
...#<Object> has no method 'debug'
at eval at <anonymous> (unknown source)
at eval (native)
at Object._evaluateOn (unknown source)
at Object._evaluateAndWrap (unknown source)
at Object.evaluate (unknown source)
and in Firefox:
@http://www.google.com.ua/:87 _firebugInj...
How do you view ALL text from an ntext or nvarchar(max) in SSMS?
...e allows to open contents of field in any external application, so if you know that it is text - you use text editor to open it. If contents is binary data with picture - you select view as picture. Sample below shows opening a picture):
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WPF Application that only has a tray icon
... Kudos for that last paragraph. That was exactly what I needed to know, and it's this level of simple, insightful detail that smacks of a good developer.
– Matthew Layton
Jun 27 '17 at 7:44
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What guidelines for HTML email design are there? [closed]
...use Hotmail used to accept it that way - I'm pretty sure they strip it out now though. Use inline styles with the style attribute if you must use CSS.
Forget entirely about float
Remember your images will probably be blocked - use background and text colour to your advantage - make sure there is som...
CSV API for Java [closed]
...kipedia.org/wiki/Comma-separated_values
Wikipedia lists 10 or something known libraries:
http://en.wikipedia.org/wiki/CSV_application_support
I compared libs listed using some kind of check list. OpenCSV turned out a winner to me (YMMV) with the following results:
+ maven
+ maven - release v...
How to speed up insertion performance in PostgreSQL
...r data.
If you're using RAID 5 or RAID 6 for direct attached storage, stop now. Back your data up, restructure your RAID array to RAID 10, and try again. RAID 5/6 are hopeless for bulk write performance - though a good RAID controller with a big cache can help.
If you have the option of using a hard...
How to handle checkboxes in ASP.NET MVC forms?
...ooking for your specific version of MVC, as many answers here are obsolete now.
22 Answers
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