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postgresql COUNT(DISTINCT …) very slow
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Have you considered the effect of caching? If doing three "explain analyze" subsequently, the first one may be slow fetching things from disk while the two latter may be fast fetching from memory.
– tobixen
Jun 28 '12 at 18:45
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Extracting Nupkg files using command line
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You can also use the NuGet command line, by specifying a local host as part of an install. For example if your package is stored in the current directory
nuget install MyPackage -Source %cd% -OutputDirectory packages
will unpack it into the target directory.
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How can I read a whole file into a string variable
...reported.
You will get a []byte instead of a string. It can be converted if really necessary:
s := string(buf)
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Django Admin - Disable the 'Add' action for a specific model
... 3 security permissions for each model:
Create (aka add)
Change
Delete
If your logged in as Admin, you get EVERYTHING no matter what.
But if you create a new user group called "General Access" (for example) then you can assign ONLY the CHANGE and DELETE permissions for all of your models.
Then...
Programmatically find the number of cores on a machine
...ine how many cores a machine has from C/C++ in a platform-independent way? If no such thing exists, what about determining it per-platform (Windows/*nix/Mac)?
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Why is XOR the default way to combine hashes?
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Assuming uniformly random (1-bit) inputs, the AND function output probability distribution is 75% 0 and 25% 1. Conversely, OR is 25% 0 and 75% 1.
The XOR function is 50% 0 and 50% 1, therefore it is good for combining uniform probabili...
Is the list of Python reserved words and builtins available in a library?
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To verify that a string is a keyword you can use keyword.iskeyword; to get the list of reserved keywords you can use keyword.kwlist:
>>> import keyword
>>> keyword.iskeyword('break')
True
>>> keyword.kwl...
How to force keyboard with numbers in mobile website in Android
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Will take a look at it today, and then will let you know if that would work. Thank you, Richard!
– ncakmak
Dec 1 '10 at 17:25
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Case insensitive comparison of strings in shell script
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if you have bash
str1="MATCH"
str2="match"
shopt -s nocasematch
case "$str1" in
$str2 ) echo "match";;
*) echo "no match";;
esac
otherwise, you should tell us what shell you are using.
alternative, using awk
str1="MATC...
Count how many files in directory PHP
...eople are saying this is confusing for some developers, should we add that if one is using namespaces (since this method requires a recent version of PHP in any case), then one must also specify the namespace: $fi = new \FilesystemIterator(DIR, \FilesystemIterator::SKIP_DOTS);
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