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Numbering rows within groups in a data frame

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How do I find the install time and date of Windows?

...rsion\InstallDate It's given as the number of seconds since January 1, 1970. (Note: for Windows 10, this date will be when the last feature update was installed, not the original install date.) To convert that number into a readable date/time just paste the decimal value in the field "UNIX TimeSt...
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Is char signed or unsigned by default?

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iOS 7: UITableView shows under status bar

...s I currently need the app to be compatible with iOS 6 I can't jump to iOS 7 Storyboards to force autolayout to use the top height guide. Has anyone found a solution that works for both versions? ...
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HTTP 404 Page Not Found in Web Api hosted in IIS 7.5

...ed it using the VS 2010 debugging dev server. But I now deployed it to IIS 7.5 and I am getting a HTTP 404 error when trying to access the application. ...
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How to implode array with key and value without foreach in PHP

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Which version of C# am I using

... | edited Jan 3 '17 at 16:02 Facundo La Rocca 2,95411 gold badge2020 silver badges3636 bronze badges ...
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MySQL table is marked as crashed and last (automatic?) repair failed

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What's the difference between ASCII and Unicode?

... 557 ASCII defines 128 characters, which map to the numbers 0–127. Unicode defines (less than) 221 ...
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How to copy a selection to the OS X clipboard

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