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In what order do static/instance initializer blocks in Java run?
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See section 12.4 and 12.5 of the JLS version 8, they go into gory detail about all of this (12.4 for static and 12.5 for instance variables).
For static initialization (section 12.4):
A class or interface type T will be initialized immediat...
Is there a built-in function to print all the current properties and values of an object?
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Pretty printing is also available in the interactive debugger as a command:
(Pdb) pp vars()
{'__builtins__': {'ArithmeticError': <type 'exceptions.ArithmeticError'>,
'AssertionError': <type 'exceptions.AssertionError'>,
'AttributeError': <type ...
How to replace an entire line in a text file by line number
... For me it says: sed: -e expression #1, char 26: unknown option to ``s' and my line is: sed -i '7s/.*/<param-value>http://localhost:8080/ASDF/services/REWS.REWSHttpSoap12Endpoint/</param-value>/' $TCE_SVN_HOME\trunk\tce\EWC\WebContent\WEB-INF\web.xml. Any idea?
–...
Why is UnhandledExceptionEventArgs.ExceptionObject an object and not an Exception?
Why is UnhandledExceptionEventArgs.ExceptionObject an object and not an Exception ?
2 Answers
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Composite Key with EF 4.1 Code First
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You can mark both ActivityID and ActivityName properties with Key annotation or you can use fluent API as described by @taylonr.
Edit:
This should work - composite key defined with annotations requires explicit column order:
public class ActivityType
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SQL Server: Maximum character length of object names
...mes can only be up to 116 character long.
It is perfectly explained here.
And the verification can be easily made with the following script contained in the blog post before:
DECLARE @i NVARCHAR(800)
SELECT @i = REPLICATE('A', 116)
SELECT @i = 'CREATE TABLE #'+@i+'(i int)'
PRINT @i
EXEC(@i)
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how to exclude null values in array_agg like in string_agg using postgres?
... non_canonical_users
FROM groups g
GROUP BY g.id
) s
Or, simpler and may be cheaper, using array_to_string which eliminates nulls:
SELECT
g.id,
array_to_string(
array_agg(CASE WHEN g.canonical = 'Y' THEN g.users ELSE NULL END)
, ','
) canonical_users,
array...
How to check if a stored procedure exists before creating it
...e clients might already have the stored procedure upon running the script, and some may not. I need to have the missing stored procedures added to the client database, but it doesn't matter how much I try to bend T-SQL syntax, I get
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Manually map column names with class properties
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Column Attribue would be handy for mapping stored procedure results.
– Ronnie Overby
Nov 2 '12 at 17:48
2
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It is more efficient to use if-return-return or if-else-return?
...like this. All we have achieved is to make the code obfuscated, unreadable and in some cases more vulnerable to implicit type promotions.
– Lundin
Feb 8 '12 at 10:51
49
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