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Random record from MongoDB
I am looking to get a random record from a huge (100 million record) mongodb .
26 Answers
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Java: What is the difference between and ?
I am unable to understand the following text... Does it mean that <clinit> is for empty constructors? Why is important to have two different versions?
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How to give ASP.NET access to a private key in a certificate in the certificate store?
...=> All tasks => Manage private key => Add IIS AppPool\AppPoolName and grant it Full control. Replace "AppPoolName" with the name of your application pool (sometimes IIS_IUSRS)
IIS 7.5 Website is running under NETWORK SERVICE. Using Certificates MMC, added "NETWORK SERVICE" to Full Trust on ...
Easy way to test a URL for 404 in PHP?
I'm teaching myself some basic scraping and I've found that sometimes the URL's that I feed into my code return 404, which gums up all the rest of my code.
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What are the lesser known but useful data structures?
...nown. A very cool use of tries is described in "TRASH - A dynamic LC-trie and hash data structure", which combines a trie with a hash function.
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edited Oct 5 '10 at 15:3...
Check for internet connection availability in Swift
...I wanted a more pure Swift solution. The existing Apple Reachability class and other third party libraries seemed to be too complicated for me to translate to Swift. I Googled some more and I came across this article which shows a simple method to check for network availability. I set out to transla...
android fragment onRestoreInstanceState
...r configuration changes, but what if you go to an activity from a fragment and then go back to the fragment?
– speedynomads
Jun 4 '13 at 16:41
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Asp.net MVC ModelState.Clear
...w SomeModel { SomeString = "some value" };
return View(newModel);
}
And still the view renders with the original model. What's odd is, when I put a breakpoint in the view and examine the model, it has the changed value. But the response stream has the old values.
Eventually I discovered ...
iOS 7 - How to display a date picker in place in a table view?
...uggests displaying picker in place in a table view in iOS 7. How to insert and animate a view between table view cells?
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How to generate a random integer number from within a range
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All the answers so far are mathematically wrong. Returning rand() % N does not uniformly give a number in the range [0, N) unless N divides the length of the interval into which rand() returns (i.e. is a power of 2). Furthermore, one has no idea whether the moduli of rand() are indep...