大约有 47,000 项符合查询结果(耗时:0.0644秒) [XML]

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For i = 0, why is (i += i++) equal to 0?

Take the following code (usable as a Console Application): 24 Answers 24 ...
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Regular expression to match URLs in Java

I use RegexBuddy while working with regular expressions. From its library I copied the regular expression to match URLs. I tested successfully within RegexBuddy. However, when I copied it as Java String flavor and pasted it into Java code, it does not work. The following class prints false : ...
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When should I use Lazy?

I found this article about Lazy : Laziness in C# 4.0 – Lazy 7 Answers 7 ...
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How do you know what to test when writing unit tests? [closed]

Using C#, I need a class called User that has a username, password, active flag, first name, last name, full name, etc. ...
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Converting numpy dtypes to native python types

If I have a numpy dtype, how do I automatically convert it to its closest python data type? For example, 12 Answers ...
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Automatically expanding an R factor into a collection of 1/0 indicator variables for every factor le

I have an R data frame containing a factor that I want to "expand" so that for each factor level, there is an associated column in a new data frame, which contains a 1/0 indicator. E.g., suppose I have: ...
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Generate colors between red and green for a power meter?

I'm writing a Java game and I want to implement a power meter for how hard you are going to shoot something. 19 Answers ...
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Difference between map, applymap and apply methods in Pandas

Can you tell me when to use these vectorization methods with basic examples? 10 Answers ...
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Is this a “good enough” random algorithm; why isn't it used if it's faster?

I made a class called QuickRandom , and its job is to produce random numbers quickly. It's really simple: just take the old value, multiply by a double , and take the decimal part. ...
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How to slice an array in Bash

Looking the "Array" section in the bash(1) man page, I didn't find a way to slice an array. 4 Answers ...