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What would cause an algorithm to have O(log log n) complexity?

...ly two main routes that will arrive at this runtime. Shrinking by a Square Root As mentioned in the answer to the linked question, a common way for an algorithm to have time complexity O(log n) is for that algorithm to work by repeatedly cut the size of the input down by some constant factor on each...
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How to specify in crontab by what user to run script? [closed]

I have few crontab jobs that run under root, but that gives me some problems. For example all folders created in process of that cron job are under user root and group root. How can i make it to run under user www-data and group www-data so when i run scripts from my website i can manipulate those ...
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Access-Control-Allow-Origin wildcard subdomains, ports and protocols

...IfModule mod_rewrite.c> <IfModule mod_headers.c> # Define the root domain that is allowed SetEnvIf Origin .+ ACCESS_CONTROL_ROOT=yourdomain.com # Check that the Origin: matches the defined root domain and capture it in # an environment var if it does RewriteEngine On ...
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Two versions of python on linux. how to make 2.7 the default

...on cd /usr/bin ls -l Here you can see something like this lrwxrwxrwx 1 root root 9 Mar 7 17:04 python -> python2.7 your default python2.7 is soft linked to the text 'python' So remove the softlink python sudo rm -r python then retry the above command ls -l you can see ...
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Difference between validate(), revalidate() and invalidate() in Swing GUI

... synchronized (getTreeLock()) { invalidate(); Container root = getContainer(); if (root == null) { // There's no parents. Just validate itself. validate(); } else { while (!root.isValidateRoot()) { if (root.getCon...
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XML Serialization - Disable rendering root element of array

Can I somehow disable rendering of root element of collection? 3 Answers 3 ...
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Errors: “INSERT EXEC statement cannot be nested.” and “Cannot use the ROLLBACK statement within an I

...ble approach: - CREATE PROCEDURE SP3 as BEGIN SELECT 1, 'Data1' UNION ALL SELECT 2, 'Data2' END go CREATE PROCEDURE SP2 as BEGIN if exists (select * from tempdb.dbo.sysobjects o where o.xtype in ('U') and o.id = object_id(N'tempdb..#tmp1')) INSERT INTO #tmp1 ...
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Repository Pattern vs DAL

...y in your domain. A repository on the other hand only deals with aggregate roots. share | improve this answer | follow | ...
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When should you use a class vs a struct in C++?

... class that has no non-static data members of type non-POD-struct, non-POD-union (or array of such types) or reference, and has no user-defined copy assignment operator and no user-defined destructor." There is no restriction on using the "struct" class-key and no restriction on using "public" (see...
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T-SQL split string

...) ) RETURNS TABLE WITH SCHEMABINDING AS RETURN ( WITH n(n) AS (SELECT 1 UNION ALL SELECT n+1 FROM n WHERE n <= LEN(@List)) SELECT [Value] = SUBSTRING(@List, n, CHARINDEX(@Delim, @List + @Delim, n) - n) FROM n WHERE n <= LEN(@List) AND SUBSTRING(@Delim + @...