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Difference between `data` and `newtype` in Haskell

...e. In particular, data introduces a type that is "lifted", meaning, essentially, that it has an additional way to evaluate to a bottom value. Since there's no additional constructor at runtime with newtype, this property doesn't hold. That extra pointer in the Book to (,) constructor allows us to ...
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How to use transactions with dapper.net?

...icitly roll back on error or does System.Transactions handle that automatically? – Norbert Norbertson Oct 3 '17 at 12:30 6 ...
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“VT-x is not available” when i start my Virtual machine [closed]

...mory resolved my issue, why does that work? I am on a virtual machine installing a virtual machine. Inception. – Jacek Trociński Nov 6 '15 at 12:04 2 ...
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What is duck typing?

...ot that well defined. Neither is Duck Typing. Google Go or Ocaml are statically typed languages with a structural subtyping-construction. Are these duck typed languages? – I GIVE CRAP ANSWERS Nov 17 '10 at 15:27 ...
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How to identify numpy types in python?

...o test for that. And so on. The point is, you have to know what you're actually asking for when you want to do something as unusual as loose manual type switching, but once you know, it's easy to implement. – abarnert Mar 11 '16 at 20:41 ...
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How to export revision history from mercurial or git to cvs?

...en we finish or maybe every once in a while we want to commit our code and all of our revision history to cvs. We don't have write access to the project's cvs repo so we can't commit very frequently. What tool can we use to export our revision history to cvs? Currently we were thinking of using git ...
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What is the simplest and most robust way to get the user's current location on Android?

... Here's what I do: First of all I check what providers are enabled. Some may be disabled on the device, some may be disabled in application manifest. If any provider is available I start location listeners and timeout timer. It's 20 seconds in my exampl...
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What is compiler, linker, loader?

...'space', 'tab' and 'new line'. Therefore this unit of compilation is also called "TOKENIZER". It also removes the comments, generates symbol table and relocation table entries. 2) Syntactic Analyzer: This unit check for the syntax in the code. For ex: { int a; int b; int c; int d...
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Why does string::compare return an int?

Why does string::compare return an int instead of a smaller type like short or char ? My understanding is that this method only returns -1, 0 or 1. ...
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SQL Server 2012 column identity increment jumping from 6 to 1000+ on 7th entry [duplicate]

... This is all perfectly normal. Microsoft added sequences in SQL Server 2012, finally, i might add and changed the way identity keys are generated. Have a look here for some explanation. If you want to have the old behaviour, you can:...