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Which iomanip manipulators are 'sticky'?

I recently had a problem creating a stringstream due to the fact that I incorrectly assumed std::setw() would affect the stringstream for every insertion, until I changed it explicitly. However, it is always unset after the insertion. ...
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Static variables in JavaScript

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Why C# fails to compare two object types with each other but VB doesn't?

I have two objects in C# and don't know if it's Boolean or any other type. However when I try to compare those C# fails to give the right answer. I have tried the same code with VB.NET and that did it ! ...
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Performance of foreach, array_map with lambda and array_map with static function

What's the performance difference (if there is any) between these three approaches, both used to transform an array to another array? ...
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Java String - See if a string contains only numbers and not letters

I have a string that I load throughout my application, and it changes from numbers to letters and such. I have a simple if statement to see if it contains letters or numbers but, something isn't quite working correctly. Here is a snippet. ...
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Git command to display HEAD commit id?

What command can I use to print out the commit id of HEAD? 9 Answers 9 ...
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Can I call a constructor from another constructor (do constructor chaining) in C++?

As a C# developer I'm used to running through constructors: 15 Answers 15 ...
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How to sort a dataframe by multiple column(s)

I want to sort a data.frame by multiple columns. For example, with the data.frame below I would like to sort by column z (descending) then by column b (ascending): ...
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Regular expression for first and last name

For website validation purposes, I need first name and last name validation. 23 Answers ...
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Moving project to another folder in Eclipse

I generally have my working projects sitting on folders on my Desktop. When they are completed I just move them to a c:\dev\ . The thing is I'm doing it in a rather archaic way. ...