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WPF Data Binding and Validation Rules Best Practices
I have a very si<em>mem>ple WPF application in which I a<em>mem> using data binding to allow editing of so<em>mem>e custo<em>mem> CLR objects. I a<em>mem> now wanting to put so<em>mem>e 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 auto<em>mem>atically put by the co<em>mem>piler 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?
...les are to be avoided. Nevertheless, I think in a practical sense, it is so<em>mem>eti<em>mem>es desirable (in situations where the variable is integral to the progra<em>mem>) to use the<em>mem>.
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Git pull without checkout?
I'<em>mem> used to running git pull and other co<em>mem><em>mem>ands fro<em>mem> within a branch I'<em>mem> working on. But I have set up a develop<em>mem>ent server that several people work on, so I don't want to have to switch branches when I do it. If I want to update an existing branch on the dev server fro<em>mem> the github repository we a...
Is there an R function for finding the index of an ele<em>mem>ent in a vector?
In R, I have an ele<em>mem>ent x and a vector v . I want to find the first index of an ele<em>mem>ent in v that is equal to x . I know that one way to do this is: which(x == v)[[1]] , but that see<em>mem>s excessively inefficient. Is there a <em>mem>ore direct way to do it?
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How to return a file using Web API?
I a<em>mem> using ASP.NET Web API . I want to download a PDF with C# fro<em>mem> the API (that the API generates).
5 Answers
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When to use a “has_<em>mem>any :through” relation in Rails?
I a<em>mem> trying to understand what has_<em>mem>any :through is and when to use it (and how). However, I a<em>mem> not getting it. I a<em>mem> reading Beginning Rails 3 and I tried Googling, but I a<em>mem> not able to understand.
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How to change the CHARACTER SET (and COLLATION) throughout a database?
Our previous progra<em>mem><em>mem>er set the wrong collation in a table (<em>Mem>ysql). He set it up with Latin collation, when it should be UTF8, and now I have issues. Every record with Chinese and Japan character turn to ??? character.
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Predicate in Java
I a<em>mem> going through the code which uses Predicate in Java. I have never used Predicate . Can so<em>mem>eone guide <em>mem>e to any tutorial or conceptual explanation of Predicate and its i<em>mem>ple<em>mem>entation in Java?
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How do I verify a <em>mem>ethod was called exactly once with <em>Mem>oq?
How do I verify a <em>mem>ethod was called exactly once with <em>Mem>oq? The Verify() vs. Verifable() thing is really confusing.
3 A...