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Quicksort vs heapsort
... Quicksort. Heapsort doesn't need more memory for another array to putting ordered data as is needed by Mergesort. So why do comercial applications stick with Quicksort? What Quicksort has that is so special over others implementations?
I've tested the algorithms myself and I've seen that Quicksort...
Returning 'IList' vs 'ICollection' vs 'Collection'
...erface.
IList<T> is essentially an ICollection<T> with random order-based access.
In this case you should decide whether or not your results require list semantics such as order based indexing (then use IList<T>) or whether you just need to return an unordered "bag" of results (t...
How to create an installer for a .net Windows Service using Visual Studio
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Using PHP with Socket.io
...eck this one. This is really important! You need this javascript libary in order for you client.php or client.html to communicate with the server.php when you run it.
https://github.com/walkor/phpsocket.io/tree/master/examples/chat/public/socket.io-client
I just copy and pasted that socket.io-clie...
Convert JavaScript string in dot notation into an object reference
...the first place (most ideal if it's only client-side or only server-side), etc. (A pre-existing unique id would be inelegant to add, but could be used if the spec otherwise requires its existence regardless.)
case 2: Working with serialized data, or data that will be displayed to the user. L...
Using Java with Nvidia GPUs (CUDA)
... on the GPU" in general. I'll summarize these again here, in no particular order.
(Disclaimer: I'm the author of http://jcuda.org/ and http://jocl.org/ )
(Byte)code translation and OpenCL code generation:
https://github.com/aparapi/aparapi : An open-source library that is created and actively mai...
What is the difference between CascadeType.REMOVE and orphanRemoval in JPA?
...eType.REMOVE and orphanRemoval=true.
For orphan removal:
If you invoke setOrders(null), the related Order entities will be removed in db automatically.
For remove cascade:
If you invoke setOrders(null), the related Order entities will NOT be removed in db automatically.
...
How can I remove duplicate rows?
...VER (PARTITION BY Col1, Col2, Col3
ORDER BY ( SELECT 0)) RN
FROM #MyTable)
DELETE FROM cte
WHERE RN > 1;
I am using ORDER BY (SELECT 0) above as it is arbitrary which row to preserve in the event of a tie.
To preserve the latest one in RowID...
What's the fastest algorithm for sorting a linked list?
... data is a comparison sort of an almost sorted list with k elements out of order. This can be sorted in O ( kn ) operations.
Copying the list to an array and back would be O(N), so any sorting algorithm can be used if space is not an issue.
For example, given a linked list containing uint_8, this ...
如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
...何查看Oracle用户的SQL执行历史记录？select * from v$sqlarea t order by t LAST_ACTIVE_TIME desc注意 ：执行此语句等等一些相关的语句 必须具有DBA 的权限 虽然
select * from v$sqlarea t order by t.LAST_ACTIVE_TIME desc
注意 ：执行此语句等等一些相关...