大约有 8,100 项符合查询结果（耗时：0.0333秒） [XML]
Boolean operators && and ||
According to the R language definition , the difference between & and && (correspondingly | and || ) is that the former is vectorized while the latter is not.
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Send data from activity to fragment in Android
I have two classes. First is activity, second is a fragment where I have some EditText . In activity I have a subclass with async-task and in method doInBackground I get some result, which I save to variable. How can I send this variable from subclass "my activity" to this fragment?
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How to remove last n characters from every element in the R vector
I am very new to R, and I could not find a simple example online of how to remove the last n characters from every element of a vector (array?)
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How do you make a HTTP request with C++?
Is there any way to easily make a HTTP request with C++? Specifically, I want to download the contents of a page (an API) and check the contents to see if it contains a 1 or a 0. Is it also possible to download the contents into a string?
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Error message “Forbidden You don't have permission to access / on this server” [closed]
I have configured my Apache by myself and have tried to load phpMyAdmin on a virtual host, but I received:
34 Answers
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Grouping functions (tapply, by, aggregate) and the *apply family
Whenever I want to do something "map"py in R, I usually try to use a function in the apply family.
10 Answers
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Using wget to recursively fetch a directory with arbitrary files in it
I have a web directory where I store some config files. I'd like to use wget to pull those files down and maintain their current structure. For instance, the remote directory looks like:
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Brew doctor says: “Warning: /usr/local/include isn't writable.”
Brew doctor says:
19 Answers
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What does the LayoutInflater attachToRoot parameter mean?
The LayoutInflater.inflate documentation isn't exactly clear to me about the purpose of the attachToRoot parameter.
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How to print register values in GDB?
How do I print the value of %eax and %ebp ?
6 Answers
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