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How to change legend title in ggplot

... Since you have two densitys I imagine you may be wanting to set your own colours with scale_fill_manual. If so you can do: df <- data.frame(x=1:10,group=c(rep("a",5),rep("b",5))) legend_title <- "OMG My Title" ggplot(df, aes(x=x, fill=group)) + geom_density(alpha=.3) + ...
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How do I read an entire file into a std::string in C++?

How do I read a file into a std::string , i.e., read the whole file at once? 15 Answers ...
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Adding Only Untracked Files

One of the commands I find incredibly useful in Git is git add -u to throw everything but untracked files into the index. Is there an inverse of that? In the last few months, I've often found myself in a position where I've interactively added some updates to the index and I want to add all of the...
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How to set the part of the text view is clickable

I have the text " Android is a Software stack ". In this text i want to set the " stack " text is clickable. in the sense if you click on that it will redirected to a new activity(not in the browser). ...
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Transpose a data frame

... also, setnames(t_mtcars, rownames(mtcars)) would be the data.table-way of setting names on a data.table (and if using a data.table object you wouldn't set the rownames) – SymbolixAU Oct 5 '17 ...
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What is the correct way of using C++11's range-based for?

... editor after snippets, if snippets enabled if (StackExchange.settings.snippets.snippetsEnabled) { StackExchange.using("snippets", function() { createEditor(); }); } else { createEditor(); ...
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Why does “return list.sort()” return None, not the list?

...rtedcontainers In my, was already thinking of refactoring from a list to a set, since I didn't want duplicates, and was then looking for a SortedSet implementation, and didn't find one in collections module... Source: stackoverflow.com/questions/5953205/… – JGFMK ...
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How to discard all changes made to a branch?

... ) and I've made a number of changes, but I need to discard them all and reset it to match the repository version. I thought git checkout design would do it, but it just tells me I'm already in branch design and that I have 3 modified files. ...
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How do I programmatically “restart” an Android app?

...kill/restart an application on Android. In my use case I want to factory-reset my application in a specific case where a server sends a specific information to the client. ...
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Oracle取前N条记录方法 Oracle实现SELECT TOP N的方法 - 爬虫/数据库 - 清...

select * from ( select * from tablexxx order by xxx desc ) where rownum <= N oracle数据库不支持mysql中limit, top功能,但可以通过rownum来限制返回的结果集的行数,rownum并不是用户添加的字段,而是oracle系统自动添加的。