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How to assign colors to categorical variables in ggplot2 that have stable mapping?
I've been getting up to speed with R in the last month.
5 Answers
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Java 8 NullPointerException in Collectors.toMap
The Java 8 Collectors.toMap throws a NullPointerException if one of the values is 'null'. I don't understand this behaviour, maps can contain null pointers as value without any problems. Is there a good reason why values cannot be null for Collectors.toMap ?
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How to reference generic classes and methods in xml documentation
When writing xml documentation you can use <see cref="something">something</see> , which works of course. But how do you reference a class or a method with generic types?
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Landscape printing from HTML
I have a HTML report, which needs to be printed landscape because of the many columns. It there a way to do this, without the user having to change the document settings?
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How do I add more members to my ENUM-type column in MySQL?
...ring representation. adding items to the end is fine, since you just add meaning old values. but changing the order / removing enums will make those numbers undefined. (eg. 1=>italy, 2=>germany), then extending will be (1=>italy, 2=>germany, 3=>sweenden).
– linta...
Can virtual functions have default parameters?
...classes have to specify the same defaults and if not, which defaults will manifest in the derived classes?
6 Answers
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How can I stop a Postgres script when it encounters an error?
Is there a way to specify that when executing a sql script it stops when encountering the first error on the script, it usually continues, regardless of previous errors.
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How to return a 200 HTTP Status Code from ASP.NET MVC 3 controller
I am writing an application that is accepting POST data from a third party service.
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How to display hidden characters by default (ZERO WIDTH SPACE ie. ​)
I just lost part of my weekend because of this ... joker - zero width space. I just used some snippets from google groups and didn't recognize that there are doubled characters, because Idea (11) didn't show them, which was causing problems with parsing config file of my app... I discovered it accid...
How to forward declare a C++ template class?
Given a template class like the following:
3 Answers
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