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What is a good Hash Function?
... is a good Hash function? I saw a lot of hash function and applications in my data structures courses in college, but I mostly got that it's pretty hard to make a good hash function. As a rule of thumb to avoid collisions my professor said that:
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Fastest way to count exact number of rows in a very large table?
...:
SQL Server example (1.4 billion rows, 12 columns)
SELECT COUNT(*) FROM MyBigtable WITH (NOLOCK)
-- NOLOCK here is for me only to let me test for this answer: no more, no less
1 runs, 5:46 minutes, count = 1,401,659,700
--Note, sp_spaceused uses this DMV
SELECT
Total_Rows= SUM(st.row_count)...
Do you use source control for your database items? [closed]
I feel that my shop has a hole because we don't have a solid process in place for versioning our database schema changes. We do a lot of backups so we're more or less covered, but it's bad practice to rely on your last line of defense in this way.
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How to duplicate sys.stdout to a log file?
...on, or I'm doing something so non-standard that nobody knows - I'll revise my question to also ask: What is the best way to accomplish logging when a python app is making a lot of system calls?
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Implementing INotifyPropertyChanged - does a better way exist?
...n improvement to use a lambda expression instead of the property name, see my answer
– Thomas Levesque
Aug 22 '09 at 17:50
9
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moving committed (but not pushed) changes to a new branch after pull
...nto its own branch rather than into master . These commits only exist on my local machine and have not been pushed to origin , but the situation is complicated somewhat in that other devs have been pushing to origin/master and I've pulled those changes.
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Efficient way to remove ALL whitespace from String?
...s the first option (without regexp) runs in less then a second (700 ms on my machine), and the second takes 3.5 seconds.
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What MIME type should I use for CSV?
...thing to do with it, or am I missing something?
– JimmyPena
Aug 8 '12 at 20:08
25
That a program ...
Check if a string contains another string
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You can also use the special word like:
Public Sub Search()
If "My Big String with, in the middle" Like "*,*" Then
Debug.Print ("Found ','")
End If
End Sub
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Comparing two byte arrays in .NET
...and if you are, you really need to benchmark this for your own case, for a myriad of reasons. For example, note the creator of the unsafe answer notes a difference of 7x slow, as opposed to 50x slower (the unsafe method's speed also depends on the alignment of data). In the rare cases where these nu...