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Determine the path of the executing BASH script [duplicate]

In a Windows command script, one can determine the directory path of the currently executing script using %~dp0 . For example: ...
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Why is null an object and what's the difference between null and undefined?

Why is null considered an object in JavaScript? 21 Answers 21 ...
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How to create a density plot in matplotlib?

In R I can create the desired output by doing: 5 Answers 5 ...
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Relative frequencies / proportions with dplyr

Suppose I want to calculate the proportion of different values within each group. For example, using the mtcars data, how do I calculate the relative frequency of number of gears by am (automatic/manual) in one go with dplyr ? ...
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How to format numbers by prepending 0 to single-digit numbers?

I want to format a number to have two digits. The problem is caused when 0 – 9 is passed, so I need it to be formatted to 00 – 09 . ...
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Is it better to use std::memcpy() or std::copy() in terms to performance?

Is it better to use memcpy as shown below or is it better to use std::copy() in terms to performance? Why? 8 Answers ...
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CSS: Set a background color which is 50% of the width of the window

Trying to achieve a background on a page that is "split in two"; two colors on opposite sides (seemingly done by setting a default background-color on the body tag, then applying another onto a div that stretches the entire width of the window). ...
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What is a “context bound” in Scala?

One of the new features of Scala 2.8 are context bounds. What is a context bound and where is it useful? 4 Answers ...
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Outline radius?

Is there anyway of getting rounded corners on the outline of a div element , similar to border-radius ? 19 Answers ...
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How do I break out of nested loops in Java?

I've got a nested loop construct like this: 35 Answers 35 ...