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Rails: how do I validate that something is a boolean?
Does rails have a validator like validates_numericality_of for boolean or do I need to roll my own?
5 Answers
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test a file upload using rspec - rails
I want to test a file upload in rails, but am not sure how to do this.
6 Answers
6
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When and why should I use fragments in Android applications? [duplicate]
...enge in passing information between screens because the Android Intent mechanism does not allow passing a reference type (i.e. object) directly between Activities. Instead the object must be serialized or a globally accessible reference made available.
By making each screen a separate Fragment, thi...
How do I use CMake?
...CMake configures the entire project using a build format of your choice, meaning it sets everything up so that you can use, for example, Visual Studio to compile. By default (at least on linux), it makes a project that uses Make instead. Make is used to actually build the project, not configure or s...
Virtualizing an ItemsControl?
I have an ItemsControl containing a list of data that I would like to virtualize, however VirtualizingStackPanel.IsVirtualizing="True" does not seem to work with an ItemsControl .
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Naming conventions for abstract classes
...veDataProvider are both DataProviderKind
Inspired by Biology where e.g. "canis lupus" belongs to the family "Canoidea", which very roughly translates to "dog-ish".
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Splitting templated C++ classes into .hpp/.cpp files--is it possible?
...f _XYZ_
//Class definition goes here
#endif
This has been discussed in Daniweb
Also in FAQ but using C++ export keyword.
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Linq: GroupBy, Sum and Count
I have a collection of products
3 Answers
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How to detect modifier key states in WPF?
Is there some global constructs that I can use whenever I need to access whether the Control, Shift, Alt buttons are down? For instance inside MouseDown event of a TreeView .
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Git merge errors
I have a git branch called 9-sign-in-out with perfectly working code, and I want to turn it into the master. I'm currently on the master branch.
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