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Order discrete x scale by frequency/value

I am making a dodged bar chart using ggplot with discrete x scale, the x axis are now arranged in alphabetical order, but I need to rearrange it so that it is ordered by the value of the y-axis (i.e., the tallest bar will be positioned on the left). ...
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Is it possible to do start iterating from an element other than the first using foreach?

I'm thinking about implementing IEnumerable for my custom collection (a tree) so I can use foreach to traverse my tree. However as far as I know foreach always starts from the first element of the collection. I would like to choose from which element foreach starts. Is it possible to somehow chang...
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Symfony 2: How do I check if a user is not logged in inside a template?

In Symfony 2 templates (using Twig), how can I effectively check whether a user is not logged in? 2 Answers ...
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How to use ng-repeat for dictionaries in AngularJs?

I know that we can easily use ng-repeat for json objects or arrays like: 4 Answers 4...
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Maximum on http header values?

Is there an accepted maximum allowed size for HTTP headers? If so, what is it? If not, is this something that's server specific or is the accepted standard to allow headers of any size? ...
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What is the relationship between UIView's setNeedsLayout, layoutIfNeeded and layoutSubviews?

Can anyone give a definitive explanation on the relationship between UIView's setNeedsLayout , layoutIfNeeded and layoutSubviews methods? And an example implementation where all three would be used. Thanks. ...
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Hexadecimal To Decimal in Shell Script

Can someone help me to convert a hexadecimal number to decimal number in a shell script? 6 Answers ...
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innerText vs innerHTML vs label vs text vs textContent vs outerText

I have a dropdown list which is populated by Javascript. 6 Answers 6 ...
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Inheriting from a template class in c++

... member variable T area , a T getArea() and a void setArea(T) member functions. 6 Answers ...
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String literals and escape characters in postgresql

Attempting to insert an escape character into a table results in a warning. 5 Answers ...