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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 ,...
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How to add text at the end of each line in Vim?

In Vim, I have the following text: 9 Answers 9 ...
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Root user/sudo equivalent in Cygwin?

I'm trying to run a bash script in Cygwin. 17 Answers 17 ...
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How to correctly use the extern keyword in C

My question is about when a function should be referenced with the extern keyword in C. 10 Answers ...
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What are the differences between WCF and ASMX web services?

I am totally confused between WCF and ASMX web services. I have used a lot of web services in my earlier stage, and now there is this new thing introduced called WCF. I can still create WCF that function as a web service. I think there will be more stuff in WCF. ...
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Using boolean values in C

C doesn't have any built-in boolean types. What's the best way to use them in C? 18 Answers ...
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How to JSON serialize sets?

I have a Python set that contains objects with __hash__ and __eq__ methods in order to make certain no duplicates are included in the collection. ...
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Python: List vs Dict for look up table

I have about 10million values that I need to put in some type of look up table, so I was wondering which would be more efficient a list or dict ? ...
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AngularJS : Initialize service with asynchronous data

I have an AngularJS service that I want to initialize with some asynchronous data. Something like this: 10 Answers ...
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How do I find a default constraint using INFORMATION_SCHEMA?

I'm trying to test if a given default constraint exists. I don't want to use the sysobjects table, but the more standard INFORMATION_SCHEMA. ...