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Does a valid XML file require an XML declaration?

...le using Sax Parser of Xerces. Is the XML declaration <?xml version="1.0" encoding="UTF-8"?> required? 3 Answers ...
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Is there a performance difference between a for loop and a for-each loop?

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Rounding a double to turn it into an int (java)

... 241 What is the return type of the round() method in the snippet? If this is the Math.round() metho...
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Confusion between factor levels and factor labels

... 131 Very short : levels are the input, labels are the output in the factor() function. A factor ha...
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SQL Server 2008 Windows Auth Login Error: The login is from an untrusted domain

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What is android:weightSum in android, and how does it work?

... 134 Per documentation, android:weightSum defines the maximum weight sum, and is calculated as the ...
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How to “crop” a rectangular image into a square with CSS?

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range over interface{} which stores a slice

... 137 Well I used reflect.ValueOf and then if it is a slice you can call Len() and Index() on the va...
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How do I get current date/time on the Windows command line in a suitable format for usage in a file/

Update: Now that it's 2016 I'd use PowerShell for this unless there's a really compelling backwards-compatible reason for it, particularly because of the regional settings issue with using date . See @npocmaka's https://stackoverflow.com/a/19799236/8479 ...
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Split a python list into other “sublists” i.e smaller lists [duplicate]

I have a python list which runs into 1000's. Something like: 3 Answers 3 ...