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What is ModelState.IsValid valid for in ASP.NET MVC in NerdDinner?
On the NerdDinner example of Professional ASP.NET MVC 1.0 there's a method to create a new dinner as copied bellow (page 89 of the free NerdDinner version).
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What is the Comonad typeclass in Haskell?
What is the Comonad typeclass in Haskell? As in Comonad from Control.Comonad in the comonad package (explanations of any other packages that provide a Comonad typeclass are also welcome). I've vaguely heard about Comonad, but all I really know about it is that is provides extract :: w a -> a ,...
Rolling back a remote Git repository
I have a remote Git repository, and I need to roll back the last n commits into cold oblivion.
4 Answers
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How do I convert dates in a Pandas data frame to a 'date' data type?
I have a Pandas data frame, one of the column contains date strings in the format YYYY-MM-DD
10 Answers
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Inserting a Link to a Webpage in an IPython Notebook
How is this done? I'd like to have the link be in a markdown cell.
5 Answers
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How to check if a value exists in an array in Ruby
I have a value 'Dog' and an array ['Cat', 'Dog', 'Bird'] .
26 Answers
26
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Undo a Git commit after push using reverse patch?
I've pushed a commit and I want to revert changes introduced by this commit by applying and committing a reversed patch. How do I do it?
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What's the difference between the four File Results in ASP.NET MVC
ASP.NET has four different types of file results:
2 Answers
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John Carmack's Unusual Fast Inverse Square Root (Quake III)
John Carmack has a special function in the Quake III source code which calculates the inverse square root of a float, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why t...
How does python numpy.where() work?
I am playing with numpy and digging through documentation and I have come across some magic. Namely I am talking about numpy.where() :
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