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Cannot add or update a child row: a foreign key constraint fails
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It means that you're trying to insert into table2 a UserID value that doesn't exist in table1....
How do I represent a time only value in .NET?
...at in those scenarios, and the date portion might need to be ignored? Have fun debugging the occurrences where you will find "0001-01-01 10:00" in your database, in external communications, etc....
– MarioDS
Mar 9 '18 at 15:39
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How to have TFS 2010 detect changes done to files outside of Visual Studio?
...ct (especially if this is embedded into VS). SVN and Mercurial do this for fun...
– user2173353
Jan 8 '15 at 11:30
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Adding Python Path on Windows 7
...out and back in after setting the Path variable.
– dk123
Nov 5 '13 at 2:34
Suffering a similar problem, had done every...
'npm' is not recognized as internal or external command, operable program or batch file
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Don't forget to reboot your computer after installing node! That one got me.
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Currency formatting in Python
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@triunenature that would result in $ 123,456.78 sometimes though. Edit: markdown takes out the extra spaces, pretend there's more between the $ and the numbers
– CyberJacob
Jul 25 '16 at 10:40
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Removing empty lines in Notepad++
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There is a plugin that adds a menu entitled TextFX. This menu, which houses a dizzying array ...
Fastest way to implode an associative array with keys
...ll on other data types too)
$str = json_encode($arr);
//output...
[{"id":"123","name":"Ice"},{"id":"234","name":"Cake"},{"id":"345","name":"Pie"}]
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How to wait in a batch script? [duplicate]
...orry about unexpected early returns (say, there's no default route and the 123.45.67.89 is instantly known to be unreachable.)
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How does OpenID authentication work?
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It's a bit verbose, and more or less written as prose, but it's a fun read and very informative about what happens behind the scenes.
(Answer pasted from my answer at OpenID login workflow?.)
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