大约有 42,000 项符合查询结果(耗时:0.0517秒) [XML]

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How does Java Garbage Collection work with Circular References?

From my understanding, garbage collection in Java cleans up some objects if nothing else is 'pointing' to that object. 8 An...
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How do I get the row count of a pandas DataFrame?

I'm trying to get the number of rows of dataframe df with Pandas, and here is my code. 14 Answers ...
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The term “Context” in programming? [closed]

I have been programming for some months now and a frequently used word is "context" in classes. Like ServletContext (Java), Activity (Android), Service (Java, Android), NSManagedContext (Objective-C, iOS). ...
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MongoDB vs. Cassandra [closed]

I am evaluating what might be the best migration option. 6 Answers 6 ...
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Append values to a set in Python

I have a set like this: 8 Answers 8 ...
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How to represent empty char in Java Character class

I want to represent an empty character in Java as "" in String... 15 Answers 15 ...
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How to use a variable for the key part of a map

Let's say I have 2 Answers 2 ...
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Boolean method naming readability

Simple question, from a readability standpoint, which method name do you prefer for a boolean method: 12 Answers ...
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What is the difference between a 'closure' and a 'lambda'?

Could someone explain? I understand the basic concepts behind them but I often see them used interchangeably and I get confused. ...
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NumPy: function for simultaneous max() and min()

numpy.amax() will find the max value in an array, and numpy.amin() does the same for the min value. If I want to find both max and min, I have to call both functions, which requires passing over the (very big) array twice, which seems slow. ...