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Using union and order by clause in mysql
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select *
from (
select 1 as Rank, id, add_date from Table
union all
select 2 as Rank, id, add_date from Table where distance < 5
union all
select 3 as Rank, id, add_date from Table where distance between 5 and 15
) a
order by rank, id, add_date desc
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What is the difference between Session.Abandon() and Session.Clear()
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Clear - Removes all keys and values from the session-state collection.
Abandon - removes all the objects stored in a Session. If you do not call the Abandon method explicitly, the server removes these objects and destroys the session when t...
Unique (non-repeating) random numbers in O(1)?
...5: 1| 7| 3|
+--+--+--+--+--+--+--+--+--+--+--+
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After 11 iterations, all numbers in the array have been selected, max == 0, and the array elements are shuffled:
+--+--+--+--+--+--+--+--+--+--+--+
| 4|10| 8| 6| 2| 0| 9| 5| 1| 7| 3|
+--+--+--+--+--+--+--+--+--+--+--+
At this point, max can be...
Does svn have a `revert-all` command?
If I want to throw away all of my changes, and return to the code that is on the repository, I do the following:
4 Answers
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How to sum all column values in multi-dimensional array?
How can I add all the columnar values by associative key? Note that key sets are dynamic.
20 Answers
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How to handle exceptions in a list comprehensions?
...n alternate values &c in case of exceptions), so it's impossible, literally speaking, to "handle exceptions in a list comprehension" because a list comprehension is an expression containing other expression, nothing more (i.e., no statements, and only statements can catch/ignore/handle exception...
What is CMake equivalent of 'configure --prefix=DIR && make all install '?
I do cmake . && make all install . This works, but installs to /usr/local .
7 Answers
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heroku - how to see all the logs
I have a small app on heroku. Whenever I want to see the logs I go to the command line and do
19 Answers
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.gitignore for PhoneGap/Cordova 3.0 projects - what should I commit?
...ignore and modify it for your needs.
On a rule of thumb you've to exclude all generated files like the bin/ and gen/ directories.
If you're developing an Android version of your app you should exclude build files too like *.apk.
All generated files in the android subdirectory should be excluded to...
Why should I use an IDE? [closed]
...meone who uses vim for programming, and works in an environment where most/all of my colleagues use either vim or emacs for all of their work, what are the advantages of IDEs? Why should I use one?
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