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Why does the default parameterless constructor go away when you create one with parameters

...ctor if you've added your own - the compiler could do pretty much whatever it wants! However, you have to look at what makes most sense: If I haven't defined any constructor for a non-static class, I most likely want to be able to instantiate that class. In order to allow that, the compiler must...
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What is a good choice of database for a small .NET application? [closed]

I'm developing a small application with C# in .NET and I want to have a small light weight database which does not use much resources. ...
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How many parameters are too many? [closed]

...mething considered so obscene as to be something that can be regulated despite the 1st Amendment guarantee to free speech? According to Justice Potter Stewart, "I know it when I see it." The same holds here. I hate making hard and fast rules like this because the answer changes not only depending...
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return, return None, and no return at all?

...e actual behavior, there is no difference. They all return None and that's it. However, there is a time and place for all of these. The following instructions are basically how the different methods should be used (or at least how I was taught they should be used), but they are not absolute rules s...
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Android Studio quick documentation always “fetching documentation”

I just move to Android studio from eclipse,I found that it always shows "fetching documentation" when I use quick documentation(Ctrl+Q),How to solve this?(I download documentation for API19,still problem) ...
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urlencode vs rawurlencode?

... It will depend on your purpose. If interoperability with other systems is important then it seems rawurlencode is the way to go. The one exception is legacy systems which expect the query string to follow form-encoding style ...
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.prop() vs .attr()

...1 changed things slightly: in the face of the predicted pile of broken websites, the jQuery team reverted attr() to something close to (but not exactly the same as) its old behaviour for Boolean attributes. John Resig also blogged about it. I can see the difficulty they were in but still disagree wi...
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What is the main difference between PATCH and PUT request?

... PATCH method requests that a set of changes described in the request entity be applied to the resource identified by the Request- URI. The set of changes is represented in a format called a "patch document" identified by a media type. If the Request-URI does not point to an existing resour...
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What is a 'multi-part identifier' and why can't it be bound?

...se errors when I try to update tables based on another table. I end up rewriting the query, change the order of joins, change some groupings and then it eventually works, but I just don't quite get it. ...
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Python Empty Generator Function

In python, one can easily define an iterator function, by putting the yield keyword in the function's body, such as: 9 Answ...