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What does the “Just” syntax mean in Haskell?

...d does. Every Haskell tutorial that I have looked at just starts using it randomly and never explains what it does (and I've looked at many). ...
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Why is lock(this) {…} bad?

...ns, special care should be taken to consider possible deadlock situations, and having an unknown number of lock entry points hinders this. For example, any one with a reference to the object can lock on it without the object designer/creator knowing about it. This increases the complexity of multi-t...
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dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output

...ies, levels=c(levels(iris$Species), "empty_level")) # Species is a factor and empty groups are included in the output iris %>% group_by(Species, .drop=FALSE) %>% tally #> Species n #> 1 setosa 50 #> 2 versicolor 50 #> 3 virginica 50 #> 4 empty_level ...
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How to get root access on Android emulator?

...tore system.img from temp folder as replace of default system.img. How to convert the resulting temporary root on a permanent First - it goes to SuperSu. It offers a binary upgrade. Update in the normal way. Reboot reject. Second - only relevant for emulators. The same AVD. The bottom line is tha...
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Using varchar(MAX) vs TEXT on SQL Server

... You can't search a text field without converting it from text to varchar. declare @table table (a text) insert into @table values ('a') insert into @table values ('a') insert into @table values ('b') insert into @table values ('c') insert into @table values ('d'...
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Sibling package imports

...ing as a package works too (but will turn out a bit awkward if you want to convert your working directory into an installable package). For the tests, specifically, pytest is able to find the api package in this situation and takes care of the sys.path hacks for you So it really depends on what yo...
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Constructor function vs Factory functions

...or more flexible prototypal inheritance models. You'd never have a need to convert from a factory to a constructor, so refactoring will never be an issue. No ambiguity about using new. Don't. (It will make this behave badly, see next point). this behaves as it normally would - so you can use it to a...
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Working with select using AngularJS's ng-options

...ITLE), where Title value of Title property and TITLE is the same value but converted to uppercase characters. ng-options="item.ID as item.Title + ' (' + (item.SomeDate | date) + ')' for item in items" gives you labels like Title (27 Sep 2015), if your model has a property SomeDate ...
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Set cursor position on contentEditable

...revious answer You can use IERange (http://code.google.com/p/ierange/) to convert IE's TextRange into something like a DOM Range and use it in conjunction with something like eyelidlessness's starting point. Personally I would only use the algorithms from IERange that do the Range <-> TextRan...
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How do I install a custom font on an HTML site

...rther-hardening-of-the-bulletproof-syntax Here are a couple of places to convert fonts for use with @font-face: http://www.fontsquirrel.com/fontface/generator http://fontface.codeandmore.com/ http://www.font2web.com/ Also cufon will work if you don't want to use font-face, and it has good doc...