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What is the fastest way to create a checksum for large files in C#
... is that SHA256Managed reads 4096 bytes at a time (inherit from FileStream and override Read(byte[], int, int) to see how much it reads from the filestream), which is too small a buffer for disk IO.
To speed things up (2 minutes for hashing 2 Gb file on my machine with SHA256, 1 minute for MD5) wra...
Oracle SQL Query for listing all Schemas in a DB
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@Andy: that's why I wrote "as a privileged user" ;)
– a_horse_with_no_name
Jan 28 '11 at 23:01
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Deleting all records in a database table
...ll.
Post.delete_all
or with a criteria
Post.delete_all "person_id = 5 AND (category = 'Something' OR category = 'Else')"
See here for more information.
The records are deleted without loading them first which makes it very fast but will break functionality like counter cache that depends on ...
NuGet behind a proxy
... proxy settings configuration since 1.4 version. But, I can't find any command line example.
13 Answers
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How do I list loaded plugins in Vim?
...vimrcs loaded (super)
:verbose set history? : reveals value of history and where set
:function : list functions
:func SearchCompl : List particular function
share
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impr...
C# getting the path of %AppData%
...t add using System if not present).
%AppData% is an environment variable, and they are not automatically expanded anywhere in .NET, although you can explicitly use the Environment.ExpandEnvironmentVariable method to do so. I would still strongly suggest that you use GetFolderPath however, because a...
Unique combination of all elements from two (or more) vectors
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this maybe what you are after
> expand.grid(a,b)
Var1 Var2
1 ABC 2012-05-01
2 DEF 2012-05-01
3 GHI 2012-05-01
4 ABC 2012-05-02
5 DEF 2012-05-02
6 GHI 2012-05-02
7 ABC 2012-05-03
8 DEF 2012-05-03
9 GHI 2012-05-03
10 ABC 2012-05-04
11...
How to check if a process is running via a batch script
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I had syntax problem with this command line. I changed it to tasklist /FI "IMAGENAME eq winword.exe" 2>NUL | find /I /N "winword.exe">NUL / if %ERRORLEVEL%==1 goto wordnotrunning in order to make it works (suspecting the quote around the if parts
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How to detect orientation change in layout in Android?
...rientation change feature - e.g. when the layout changes from portrait to landscape (or vice versa). How can I detect when the orientation change event finished.
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Hibernate error - QuerySyntaxException: users is not mapped [from users]
I'm trying to get a list of all the users from "users" table and I get the following error:
18 Answers
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