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LINQ Aggregate algorithm explained
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The easiest-to-understand definition of Aggregate is that it performs an operation on each element of the list taking into account the operations that have gone before. That is to say it performs the action on the first and second element and carries the r...
Data access object (DAO) in Java
...through a document and I came across a term called DAO . I found out that it is a Data Access Object. Can someone please explain me what this actually is?
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Getting the IP address of the current machine using Java
...ess();
}
This way works well when there are multiple network interfaces. It always returns the preferred outbound IP. The destination 8.8.8.8 is not needed to be reachable.
Connect on a UDP socket has the following effect: it sets the destination for Send/Recv, discards all packets from other ad...
rsync error: failed to set times on “/foo/bar”: Operation not permitted
I'm getting a confusing error from rsync and the initial things I'm finding from web searches (as well as all the usual chmod'ing) are not solving it:
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How do I remove a submodule?
How do I remove a Git submodule?
30 Answers
30
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std::string to float or double
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std::string num = "0.6";
double temp = ::atof(num.c_str());
Does it for me, it is a valid C++ syntax to convert a string to a double.
You can do it with the stringstream or boost::lexical_cast but those come with a performance penalty.
Ahaha you have a Qt project ...
QString winOpacit...
Are there best practices for (Java) package organization? [closed]
A little while ago, I saw a question answered here regarding the fine-grained organization of java packages. For example, my.project.util , my.project.factory , my.project.service , etc.
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How to wait for a keypress in R?
...te in a comment, you don't have to use the cat before readline(). Simply write:
readline(prompt="Press [enter] to continue")
If you don't want to assign it to a variable and don't want a return printed in the console, wrap the readline() in an invisible():
invisible(readline(prompt="Press [enter...
Get the last item in an array
...).
Though, you might want to consider doing this server-side if possible: it will be cleaner and work for people without JS.
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Using Emacs to recursively find and replace in text files not already open
As a follow-up to this question , it's trying to find out how to do something like this which should be easy, that especially stops me from getting more used to using Emacs and instead starting up the editor I'm already familiar with. I use the example here fairly often in editing multiple files.
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