大约有 42,000 项符合查询结果(耗时:0.0436秒) [XML]

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How do I make a matrix from a list of vectors in R?

Goal: from a list of vectors of equal length, create a matrix where each vector becomes a row. 6 Answers ...
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Can a C++ enum class have methods?

I have an enum class with two values, and I want to create a method which receives a value and returns the other one. I also want to maintain type safety(that's why I use enum class instead of enums). ...
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What is the use of interface constants?

I am learning Java and just found that the Interface can have fields, which are public static and final. I haven't seen any examples of these so far. What are some of the use cases of these Interface Constants and can I see some in the Java Standard Library? ...
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What is Weak Head Normal Form?

What does Weak Head Normal Form (WHNF) mean? What does Head Normal form (HNF) and Normal Form (NF) mean? 6 Answers ...
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What strategies and tools are useful for finding memory leaks in .NET?

I wrote C++ for 10 years. I encountered memory problems, but they could be fixed with a reasonable amount of effort. 15 Ans...
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Programmatically open new pages on Tabs

I'm trying to "force" Safari or IE7 to open a new page using a new tab . 11 Answers 1...
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Understanding the meaning of the term and the concept - RAII (Resource Acquisition is Initialization

Could you C++ developers please give us a good description of what RAII is, why it is important, and whether or not it might have any relevance to other languages? ...
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Why is exception handling bad?

Google's Go language has no exceptions as a design choice, and Linus of Linux fame has called exceptions crap. Why? 15 Answ...
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Truncating floats in Python

I want to remove digits from a float to have a fixed number of digits after the dot, like: 29 Answers ...
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Why this line xmlns:android=“http://schemas.android.com/apk/res/android” must be the first in the la

Why is this line needed in xml layout file? 12 Answers 12 ...