大约有 42,000 项符合查询结果(耗时:0.0410秒) [XML]

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What's the difference between identifying and non-identifying relationships?

I haven't been able to fully grasp the differences. Can you describe both concepts and use real world examples? 15 Answers ...
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Handler vs AsyncTask vs Thread [closed]

I got slightly confused about the differences between Handlers , AsyncTask and Threads in Android. I've read quite a few blogs and questions here in StackOverflow. ...
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What does OSGi solve?

I've read on Wikipedia and other sites about OSGi , but I don't really see the big picture. It says that it's a component-based platform, and that you can reload modules at runtime. Also the "practical example" given everywhere is the Eclipse Plugin Framework. ...
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Which equals operator (== vs ===) should be used in JavaScript comparisons?

I'm using JSLint to go through JavaScript, and it's returning many suggestions to replace == (two equals signs) with === (three equals signs) when doing things like comparing idSele_UNVEHtype.value.length == 0 inside of an if statement. ...
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Trying to embed newline in a variable in bash [duplicate]

I have 7 Answers 7 ...
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How to check if an object is a list or tuple (but not string)?

This is what I normally do in order to ascertain that the input is a list / tuple - but not a str . Because many times I stumbled upon bugs where a function passes a str object by mistake, and the target function does for x in lst assuming that lst is actually a list or tuple . ...
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Understanding Python's “is” operator

What does it really mean? 11 Answers 11 ...
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Create numpy matrix filled with NaNs

I have the following code: 8 Answers 8 ...
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Create a pointer to two-dimensional array

I need a pointer to a static 2-dimensional array. How is this done? 10 Answers 10 ...
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Does Javascript pass by reference? [duplicate]

Does Javascript pass by references or pass by values? Here is an example from Javascript: The Good Parts . I am very confused about my parameter for the rectangle function. It is actually undefined , and redefined inside the function. There are no original reference. If I remove it from the func...