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Android Studio says “cannot resolve symbol” but project compiles

...alidate and Restart" option to fix this. EDIT 2: This fix should work for all similar incidents and is not a twitter4j specific resolution. share | improve this answer | fol...
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Remove blank attributes from an Object in Javascript

How do I remove all attributes which are undefined or null in a JavaScript object? 37 Answers ...
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How to avoid isset() and empty()

... For those interested, I have expanded this topic into a small article, which provides the below information in a somewhat better structured form: The Definitive Guide To PHP's isset And empty IMHO you should think about not just making the app "E_NOTICE compatible", but restructu...
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How are feature_importances in RandomForestClassifier determined?

...d in [1] (often cited, but unfortunately rarely read...). It is sometimes called "gini importance" or "mean decrease impurity" and is defined as the total decrease in node impurity (weighted by the probability of reaching that node (which is approximated by the proportion of samples reaching that no...
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Difference between __str__ and __repr__?

...e come right out and say it — I do not believe in debuggers. I don’t really know how to use any debugger, and have never used one seriously. Furthermore, I believe that the big fault in debuggers is their basic nature — most failures I debug happened a long long time ago, in a galaxy far far a...
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Convert nested Python dict to object?

...; s.a 1 >>> s.b {'c': 2} >>> s.c Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'MyStruct' object has no attribute 'c' >>> s.d ['hi'] The alternative (original answer contents) is: class Struct: def __init__(self...
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How do I use PHP namespaces with autoload?

... $class parameter of autoload is the class name as written in constructor call. – tishma Feb 6 '13 at 12:29 1 ...
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Determine the line of code that causes a segmentation fault?

...e tutorial to get you started with GDB. Where the segfault occurs is generally only a clue as to where "the mistake which causes" it is in the code. The given location is not necessarily where the problem resides. share ...
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Getter and Setter declaration in .NET [duplicate]

... a plain field: public string MyField But this field can be accessed by all outside users of your class. People can insert illegal values or change the value in ways you didn't expect. By using a property, you can encapsulate the way your data is accessed. C# has a nice syntax for turning a fiel...
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Structure padding and packing

.... A note though - unaligned memory access is slower on architectures that allow it (like x86 and amd64), and is explicitly prohibited on strict alignment architectures like SPARC. share | improve t...