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WPF Data Binding and Validation Rules Best Practices
I have a very simple WPF application in which I am using data binding to allow editing of some custom CLR objects. I am now wanting to put some input validation in when the user clicks save. However, all the WPF books I have read don't really devote any space to this issue. I see that you can create...
Is it unnecessary to put super() in constructor?
Isn't this one automatically put by the compiler if I don't put it in a subclass's constructor?
6 Answers
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Is it possible to use global variables in Rust?
I know that in general, global-variables are to be avoided. Nevertheless, I think in a practical sense, it is sometimes desirable (in situations where the variable is integral to the program) to use them.
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Is there an R function for finding the index of an element in a vector?
In R, I have an element x and a vector v . I want to find the first index of an element in v that is equal to x . I know that one way to do this is: which(x == v)[[1]] , but that seems excessively inefficient. Is there a more direct way to do it?
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How to return a file using Web API?
I am using ASP.NET Web API . I want to download a PDF with C# from the API (that the API generates).
5 Answers
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When to use a “has_many :through” relation in Rails?
I am trying to understand what has_many :through is and when to use it (and how). However, I am not getting it. I am reading Beginning Rails 3 and I tried Googling, but I am not able to understand.
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What does “default” mean after a class' function declaration?
I've seen default used next to function declarations in a class. What does it do?
5 Answers
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How do I verify a method was called exactly once with Moq?
How do I verify a method was called exactly once with Moq? The Verify() vs. Verifable() thing is really confusing.
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await vs Task.Wait - Deadlock?
I don't quite understand the difference between Task.Wait and await .
3 Answers
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What is the difference between assert, expect and should in Chai?
What is the difference between assert , expect and should , and when to use what?
2 Answers
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