大约有 45,000 项符合查询结果(耗时:0.0581秒) [XML]
Debugging doesn't start [closed]
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Thank you for this. Lost two hours of my life trying to solved this!
– Paul Alexander
Feb 2 '17 at 16:02
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Warning: Null value is eliminated by an aggregate or other SET operation in Aqua Data Studio
... way of counting, and the warning is nothing more than a warning. However if you are concerned, and you want to get a true count of uids in this case then you could use:
SUM(CASE WHEN [uid] IS NULL THEN 0 ELSE 1 END) AS [new_count]
This would not add a lot of overheads to your query.
(tested mss...
Unit tests vs Functional tests
What is the difference between unit tests and functional tests? Can a unit test also test a function?
14 Answers
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How to create a unique index on a NULL column?
...rdingly. It's actually a failure in in SQL Server to honor various SQL specifications: here is a link for a request for the "correct implementation" for what it is worth: connect.microsoft.com/SQLServer/feedback/details/299229/….
– user166390
Aug 8 '10 at 5:0...
Convert a python dict to a string and back
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If your dictionary isn't too big maybe str + eval can do the work:
dict1 = {'one':1, 'two':2, 'three': {'three.1': 3.1, 'three.2': 3.2 }}
str1 = str(dict1)
dict2 = eval(str1)
print dict1==dict2
You can use ast.literal_ev...
Convert Set to List without creating new List
...t);
EDIT: as respond to the edit of the question.
It is easy to see that if you want to have a Map with Lists as values, in order to have k different values, you need to create k different lists.
Thus: You cannot avoid creating these lists at all, the lists will have to be created.
Possible work ...
How to uncompress a tar.gz in another directory
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You can use the option -C (or --directory if you prefer long options) to give the target directory of your choice in case you are using the Gnu version of tar. The directory should exist:
mkdir foo
tar -xzf bar.tar.gz -C foo
If you are not using a tar capable of ...
Objective-C pass block as parameter
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Typedefs not only make the code easier to write, but significantly easier to read since block/function pointer syntax isn't the cleanest.
– pyj
Oct 18 '14 at 15:12
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How do I do an initial push to a remote repository with Git?
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I should add that if you want other people to collaborate with you on this repo, you should add --shared to the end of the git --bare init command. This will setup the necessary permissions.
– Josh Lindsey
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How can I access getSupportFragmentManager() in a fragment?
...:
FragmentManager fragManager = myContext.getSupportFragmentManager(); //If using fragments from support v4
or
FragmentManager fragManager = myContext.getFragmentManager();
You are done.
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