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ModelState.IsValid == false, why?

...e that 0 errors and IsValid == false": here's MVC source code from https://github.com/Microsoft/referencesource/blob/master/System.Web/ModelBinding/ModelStateDictionary.cs#L37-L41 public bool IsValid { get { return Values.All(modelState => modelState.Errors.Count == 0); } } Now...
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How can Perl's print add a newline by default?

...o use say in Perl 5.10 or 5.12 if you add use feature qw(say); to the beginning of your program. Or you can use Modern::Perl to get this and other features. See perldoc feature for more details. share | ...
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Automatically remove Subversion unversioned files

Does anybody know a way to recursively remove all files in a working copy that are not under version control? (I need this to get more reliable results in my automatic build VMware.) ...
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How to provide different Android app icons for different gradle buildTypes?

I have two build types set in my gradle file: debug and release . I'd like to be able to set a different app icon for the debug build type. Is there any way to this just through the build type, without getting into product flavors? build.gradle file is below. ...
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Delegates: Predicate vs. Action vs. Func

Can someone provide a good explanation (hopefully with examples) of these 3 most important delegates: 8 Answers ...
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Different floating point result with optimization enabled - compiler bug?

... on Visual Studio 2008 with and without optimization. But it only works on g++ without optimization (O0). 7 Answers ...
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no acceptable C compiler found in $PATH when installing python

I'm trying to install new python environment on my shared hosting. I follow the steps written in this post : 11 Answers ...
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How to interpolate variables in strings in JavaScript, without concatenation?

I know in PHP we can do something like this: 16 Answers 16 ...
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Add line break to ::after or ::before pseudo-element content

I do not have access to the HTML or PHP for a page and can only edit via CSS. I've been doing modifications on a site and adding text via the ::after or ::before pseudo-elements and have found that escape Unicode should be used for things such as a space before or after the added content. ...
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Best way to select random rows PostgreSQL

I want a random selection of rows in PostgreSQL, I tried this: 12 Answers 12 ...