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Using FileSystemWatcher to monitor a directory
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146
The problem was the notify filters. The program was trying to open a file that was still copyi...
Logging levels - Logback - rule-of-thumb to assign log levels
...while attempting to open config file: /usr/local/app/somefile.txt. userId=12344."
There are also a number of good logging guides out there... for example, here's an edited snippet from JCL (Jakarta Commons Logging):
error - Other runtime errors or unexpected conditions. Expect these to be ...
How to strip all whitespace from string
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How to do 3 table JOIN in UPDATE query?
....column_b
JOIN TABLE_C c ON [condition]
SET a.column_c = a.column_c + 1
EDIT:
For general Update join :
UPDATE TABLEA a
JOIN TABLEB b ON a.join_colA = b.join_colB
SET a.columnToUpdate = [something]
shar...
Why is Class.newInstance() “evil”?
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81
The Java API documentation explains why (http://java.sun.com/javase/6/docs/api/java/lang/Class.h...
SQL Server - stop or break execution of a SQL script
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The raiserror method
raiserror('Oh no a fatal error', 20, -1) with log
This will terminate the connection, thereby stopping the rest of the script from running.
Note that both severity level 20 or higher and the WITH LOG option are necessary for it to work this way.
This even wor...
How to find a parent with a known class in jQuery?
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501
Assuming that this is .d, you can write
$(this).closest('.a');
The closest method returns the...
UUID max character length
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174
Section 3 of RFC4122 provides the formal definition of UUID string representations. It's 36 c...
C# pattern to prevent an event handler hooked twice [duplicate]
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151
Explicitly implement the event and check the invocation list. You'll also need to check for nu...