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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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ActionBarCompat: java.lang.IllegalStateException: You need to use a Theme.AppCompat

... Excellent, I missed this. Don't forget all the other -vXX folders as well, or it'll work fine in your test env, only to bite you once someone uses one of those versions. – falstro Jan 20 '14 at 11:27 ...
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What would be a good docker webdev workflow?

..., fig is now deprecated in favor of docker-compose – allan.simon Apr 10 '15 at 20:38  |  show 1 more comment ...
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Standard Android Button with a different color

... I discovered that this can all be done in one file fairly easily. Put something like the following code in a file named custom_button.xml and then set background="@drawable/custom_button" in your button view: <?xml version="1.0" encoding="utf-8"?&...
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LINQ with groupby and count

... After calling GroupBy, you get a series of groups IEnumerable<Grouping>, where each Grouping itself exposes the Key used to create the group and also is an IEnumerable<T> of whatever items are in your original data set. ...
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Removing duplicate rows in vi?

... this hightlights all the duplicate lines for me but doesn't delete, am I missing a step here? – ak85 Sep 14 '12 at 23:57 ...
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How to find the files that are created in the last hour in unix

... This is great and all, but these flags don't exist on Solaris find that I'm using. OP said Unix and I think these are Linux only. – jiggy Apr 17 '14 at 19:53 ...
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Polymorphism: Why use “List list = new ArrayList” instead of “ArrayList list = new ArrayList”? [dupl

... code only knows that data is of type List, which is preferable because it allows you to switch between different implementations of the List interface with ease. For instance, say you were writing a fairly large 3rd party library, and say that you decided to implement the core of your library with...
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Overwrite or override

...ority to reject or cancel (a decision, view, etc.) – allicarn Nov 15 '12 at 19:50 add a comme...
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pinpointing “conditional jump or move depends on uninitialized value(s)” valgrind message

... use of uninitialised data in a way that might affect your program's externally-visible behaviour. From the Valgrind FAQ: As for eager reporting of copies of uninitialised memory values, this has been suggested multiple times. Unfortunately, almost all programs legitimately copy uninitialised ...