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MySQL SELECT only not null values
...hough...
SELECT val1 AS val
FROM your_table
WHERE val1 IS NOT NULL
UNION ALL
SELECT val2
FROM your_table
WHERE val2 IS NOT NULL
/*And so on for all your columns*/
The disadvantage of the above is that it scans the table multiple times once for each column. That may possibly be avoided by the b...
What's the difference between tilde(~) and caret(^) in package.json?
After I upgraded to latest stable node and npm , I tried npm install moment --save . It saves the entry in the package.json with the caret ^ prefix. Previously, it was a tilde ~ prefix.
...
Git serve: I would like it that simple
...lowing switches:
cd project
git daemon --reuseaddr --base-path=. --export-all --verbose
This tells git-daemon to serve up all projects inside the current directory (which I assume is the project directory containing the .git/ folder). It also tells it to re-use the same address if you shut it dow...
UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0' in position 20: ordinal not in rang
...read the Python Unicode HOWTO. This error is the very first example.
Basically, stop using str to convert from unicode to encoded text / bytes.
Instead, properly use .encode() to encode the string:
p.agent_info = u' '.join((agent_contact, agent_telno)).encode('utf-8').strip()
or work entirely i...
How to convert a Git shallow clone to a full clone?
Follow-up of this so-question: if I have a shallow clone, how to fetch all older commits to make it a full clone?
6 Answe...
Hibernate Criteria returns children multiple times with FetchType.EAGER
...
This is actually the expected behaviour if I understood your configuration correctly.
You get the same Order instance in any of the results, but since now you are doing a join with the OrderTransaction, it has to return the same amount ...
Do you (really) write exception safe code? [closed]
...hen, answer the hidden question behind them.
Answering questions
Do you really write exception safe code?
Of course, I do.
This is the reason Java lost a lot of its appeal to me as a C++ programmer (lack of RAII semantics), but I am digressing: This is a C++ question.
It is, in fact, necessary whe...
SQL update fields of one table from fields of another one
... The question is asking about how to do it without specifying all the column names. (And I am too.)
– cluesque
Jun 6 '12 at 16:29
2
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Refresh all files in buffer from disk in vim
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bufdo e curiously leaves all the buffers un-syntax-highlighted
– Steven Lu
Jul 9 '13 at 23:03
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What is the most ridiculous pessimization you've seen? [closed]
We all know that premature optimization is the root of all evil because it leads to unreadable/unmaintainable code. Even worse is pessimization, when someone implements an "optimization" because they think it will be faster, but it ends up being slower, as well as being buggy, unmaintainable, etc...