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How does `is_base_of` work?

...all to check, both versions are viable because Host can be converted to D* and B*. It's a user defined conversion sequence as described by 13.3.3.1.2 from Host<B, D> to D* and B* respectively. For finding conversion functions that can convert the class, the following candidate functions are sy...
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Cleaner way to update nested structures

... Zippers Huet's Zipper provides convenient traversal and 'mutation' of an immutable data structure. Scalaz provides Zippers for Stream (scalaz.Zipper), and Tree (scalaz.TreeLoc). It turns out that the structure of the zipper is automatically derivable from the original data str...
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Can Visual Studio 2012 be installed side-by-side w/ Visual Studio 2010?

Will Visual Studio 2012 interfere/break .NET 4 and/or Visual Studio 2010 if installed side-by-side on the same instance of Windows? ...
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Git - Undo pushed commits

...in a remote repository, synchronized with a local repository (development) and the server one (prod). I've been making some commited changes already pushed to remote and pulled from the server. Now, I want to undo those changes. So I could just git checkout to the commit before the changes and com...
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When would you use a WeakHashMap or a WeakReference?

...mplementation of so I'm trying to figure out what the use case for them is and how the implementation would work. When have you needed to use a WeakHashMap or WeakReference and how was it used? ...
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How do you truncate all tables in a database using TSQL?

... EXEC sp_MSForEachTable 'TRUNCATE TABLE ?' Couple more links for 2000 and 2005/2008.. share | improve this answer | follow | ...
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How does the HyperLogLog algorithm work?

I've been learning about different algorithms in my spare time recently, and one that I came across which appears to be very interesting is called the HyperLogLog algorithm - which estimates how many unique items are in a list. ...
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What does “abstract over” mean?

...ala literature, I encounter the phrase "abstract over", but I don't understand the intent. For example , Martin Odersky writes ...
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How to pinch out in iOS simulator when map view is only a portion of the screen?

...ay circles that represent your fingers around the screen by holding Option and Shift and moving the mouse. share | improve this answer | follow | ...
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How to modify a text file?

I'm using Python, and would like to insert a string into a text file without deleting or copying the file. How can I do that? ...