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Which parallel sorting algorithm has the best average case performance?
Sorting takes O(n log n) in the serial case. If we have O(n) processors we would hope for a linear speedup. O(log n) parallel algorithms exist but they have a very high constant. They also aren't applicable on commodity hardware which doesn't have anywhere near O(n) processors. With p processors, re...
Command to collapse all sections of code?
In Visual Studio is there a command to collapse/expand all the sections of code in a file?
20 Answers
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Can't pickle when using multiprocessing Pool.map()
I'm trying to use multiprocessing 's Pool.map() function to divide out work simultaneously. When I use the following code, it works fine:
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Parameterize an SQL IN clause
How do I parameterize a query containing an IN clause with a variable number of arguments, like this one?
40 Answers
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How can I download HTML source in C#
...sing (WebClient client = new WebClient ()) // WebClient class inherits IDisposable
{
client.DownloadFile("http://yoursite.com/page.html", @"C:\localfile.html");
// Or you can get the file content without saving it
string htmlCode = client.DownloadString("http://yoursite.com/page.html");...
Fastest way to count exact number of rows in a very large table?
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Simple answer:
Database vendor independent solution = use the standard = COUNT(*)
There are approximate SQL Server solutions but don't use COUNT(*) = out of scope
Notes:
COUNT(1) = COUNT(*) = COUNT(PrimaryKey) just in case
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base64 encoded images in email signatures
I have to include some images (company logo's etc) in email signatures. I've had all sorts of issues using the embedded images produced by the email system in question (they get sent as attachments generally) and as linked images (requiring permission to display them in the email received).
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Generate a Hash from string in Javascript
I need to convert strings to some form of hash. Is this possible in JavaScript?
22 Answers
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How do I find the location of my Python site-packages directory?
How do I find the location of my site-packages directory?
21 Answers
21
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MySQL/Amazon RDS error: “you do not have SUPER privileges…”
I'm attempting to copy my mysql database from an Amazon EC2 to an RDS:
7 Answers
7
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