大约有 26,000 项符合查询结果(耗时:0.0542秒) [XML]

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Factors in R: more than an annoyance?

One of the basic data types in R is factors. In my experience factors are basically a pain and I never use them. I always convert to characters. I feel oddly like I'm missing something. ...
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Removing numbers from string [closed]

How can I remove digits from a string? 8 Answers 8 ...
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How to echo or print an array in PHP?

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How to disable GCC warnings for a few lines of code

In Visual C++, it's possible to use #pragma warning (disable: ...) . Also I found that in GCC you can override per file compiler flags . How can I do this for "next line", or with push/pop semantics around areas of code using GCC? ...
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Why should I avoid using Properties in C#?

In his excellent book, CLR Via C#, Jeffrey Richter said that he doesn't like properties, and recommends not to use them. He gave some reason, but I don't really understand. Can anyone explain to me why I should or should not use properties? In C# 3.0, with automatic properties, does this change? ...
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Android, getting resource ID from string?

I need to pass a resource ID to a method in one of my classes. It needs to use both the id that the reference points to and also it needs the string. How should I best achieve this? ...
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Split a string at uppercase letters

What is the pythonic way to split a string before the occurrences of a given set of characters? 16 Answers ...
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XDocument or XmlDocument

I am now learning XmlDocument but I've just ran into XDocument and when I try to search the difference or benefits of them I can't find something useful, could you please tell me why you would use one over another ? ...
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Condition within JOIN or WHERE

Is there any difference (performance, best-practice, etc...) between putting a condition in the JOIN clause vs. the WHERE clause? ...
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How to delete last character in a string in C#?

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