大约有 47,000 项符合查询结果(耗时:0.0700秒) [XML]

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How to use the 'sweep' function

...nd use in the operation defined by FUN. For instance, if you want to add 1 to the 1st row, 2 to the 2nd, etc. of the matrix you defined, you will do: sweep (M, 1, c(1: 4), "+") I frankly did not understand the definition in the R documentation either, I just learned by looking up examples. ...
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Best way to test if a generic type is a string? (C#)

...n we will have a default instance of the type, not null. Here is attempt 1: 6 Answers ...
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C# HttpWebRequest vs WebRequest

... 134 The Create method is static, and exists only on WebRequest. Calling it as HttpWebRequest.Creat...
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How to construct a set out of list items in python?

... | edited Apr 2 '13 at 16:14 answered Apr 2 '13 at 16:02 ...
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Does JavaScript have “Short-circuit” evaluation?

... 120 Yes, JavaScript has "short-circuit" evaluation. if (true == true || foo.foo){ // Passes, ...
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Difference between CMAKE_CURRENT_SOURCE_DIR and CMAKE_CURRENT_LIST_DIR

... 1 Answer 1 Active ...
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How to pass an array into jQuery .data() attribute

... 144 It's treating your variable as a string, the zeroth element of which is [. This is happening ...
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What exactly is Arel in Rails 3.0?

... 182 What exactly is Arel in Rails 3.0? It's an object model for an algebra of relational query o...
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Deserialize from string instead TextReader

... | edited Oct 6 '16 at 12:19 meJustAndrew 4,44244 gold badges3434 silver badges6161 bronze badges ...
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How do I revert to a previous package in Anaconda?

... 147 I had to use the install function instead: conda install pandas=0.13.1 ...