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Should switch statements always contain a default clause?

In one of my first code reviews (a while back), I was told that it's good practice to include a default clause in all switch statements. I recently remembered this advice but can't remember what the justification was. It sounds fairly odd to me now. ...
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A type for Date only in C# - why is there no Date type?

In our C# project we have the need for representing a date without a time. I know of the existence of the DateTime, however, it incorporates a time of day as well. I want to make explicit that certain variables and method-arguments are date-based . Hence I can't use the DateTime.Date property ...
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What are the benefits of Java's types erasure?

I read a tweet today that said: 11 Answers 11 ...
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Best way for a 'forgot password' implementation? [closed]

I'm looking for the best method to implement a "forgot password" feature. 10 Answers 1...
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The difference between bracket [ ] and double bracket [[ ]] for accessing the elements of a list or

R provides two different methods for accessing the elements of a list or data.frame: [] and [[]] . 12 Answers ...
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Multiple variables in a 'with' statement?

Is it possible to declare more than one variable using a with statement in Python? 6 Answers ...
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Is Ruby pass by reference or by value?

@user object adds errors to the lang_errors variable in the update_lanugages method. when I perform a save on the @user object I lose the errors that were initially stored in the lang_errors variable. ...
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Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?

Why would you create a "Implicitly Unwrapped Optional" vs creating just a regular variable or constant? If you know that it can be successfully unwrapped then why create an optional in the first place? For example, why is this: ...
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How do ACID and database transactions work?

What is the relationship between ACID and database transaction? 8 Answers 8 ...
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Is there a JavaScript function that can pad a string to get to a determined length?

I am in need of a JavaScript function which can take a value and pad it to a given length (I need spaces, but anything would do). I found this: ...