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Foreign key constraints: When to use ON UPDATE and ON DELETE
...s attempt to delete these related records (often automatic) will result in error.
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Is unsigned integer subtraction defined behavior?
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– Lightness Races in Orbit
Feb 22 '13 at 18:05
5
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Why doesn't c++ have &&= or ||= for booleans?
...erators &&= and ||= would be logical, and these operators might be error-prone because many developers would expect foo() be always called in x &&= foo().
bool x;
// ...
x &&= foo(); // Many developers might be confused
x = x && foo(); // Still confu...
How do I modify a MySQL column to allow NULL?
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Your syntax error is caused by a missing "table" in the query
ALTER TABLE mytable MODIFY mycolumn varchar(255) null;
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Unable to simultaneously satisfy constraints, will attempt to recover by breaking constraint
Below is the error message I receive in the debug area. It runs fine and nothing is wrong except that I receive this error. Would this prevent apple accepting the app? How do I fix it?
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TypeError: sequence item 0: expected string, int found
...be unicode strings and therefore may cause the str to throw a UnicodeEncodeError error. In that case, replace the function str by the function unicode.
For example, assume the string Libië (Dutch for Libya), represented in Python as the unicode string u'Libi\xeb':
print str(u'Libi\xeb')
throws ...
Selecting and manipulating CSS pseudo-elements such as ::before and ::after using jQuery
.... Demo
– Maksim Vi.
Jan 20 '12 at 1:05
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That's because no browser in existence has implemented ...
Resharper- Find all unused classes
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First enable "Analyze Errors In Solution" (right-click on the Resharper icon in the status bar).
Then right-click the solution node and select "Find Code issues". In the "Inspection results" tool window you can group by "Issue type" and look for ...
How to remove elements from a generic list while iterating over it?
... dreaded "Collection was modified; enumeration operation may not execute." error. The compiler makes a copy of "list", so that you can safely do the remove on the array.
While this pattern is not super efficient, it has a natural feel and is flexible enough for almost any situation. Such as when y...
Handler is abstract ,cannot be instantiated
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@Glenn--, srsly, this just solved all manner of other errors in my code. ++ to this answer!
– Joel Balmer
Mar 12 '14 at 22:28
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