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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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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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Merge Images Side by Side(Horizontally)

I have five images of sizes: 600x30, 600x30, 600x30, 600x30, 810x30. Their names are: 0.png, 1.png, 2.png, 3.png, 4.png, respectively. ...
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How to “crop” a rectangular image into a square with CSS?

... 10 Answers 10 Active ...
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Eclipse error: 'Failed to create the Java Virtual Machine'

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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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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 can you determine a point is between two other points on a line segment?

... 127 Check if the cross product of (b-a) and (c-a) is 0, as tells Darius Bacon, tells you if the po...
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How to get a value from a cell of a dataframe?

... 11 Answers 11 Active ...
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Convert a String representation of a Dictionary to a dictionary?

... 1219 Starting in Python 2.6 you can use the built-in ast.literal_eval: >>> import ast &g...