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ReactJS - Does render get called any time “setState” is called?
...te(object nextProps, object nextState), each component has this method and it's responsible to determine "should component update (run render function)?" every time you change state or pass new props from parent component.
You can write your own implementation of shouldComponentUpdate method for yo...
How can I create tests in Android Studio?
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This answer is for people who are just getting started with Android testing. I will provide two simple examples to help you see how testing works. If you follow along for the next 10 minutes, you will be all set up to start adding your tests to your own app. I think you'll be surp...
C++ catching all exceptions
... // ...
} catch (...) {
// ...
}
will catch all C++ exceptions, but it should be considered bad design. You can use c++11's new current_exception mechanism, but if you don't have the ability to use c++11 (legacy code systems requiring a rewrite), then you have no named exception pointer to u...
Xcode 6 iPhone Simulator Application Support location
...upport for the iOS 8 iPhone Simulator. Where are my files and Core Data sqlite database being stored?
16 Answers
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Unique (non-repeating) random numbers in O(1)?
...t doesn't resort to something like an O(N) search of previous values to do it. Is this possible?
22 Answers
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Javascript reduce on array of objects
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After the first iteration your're returning a number and then trying to get property x of it to add to the next object which is undefined and maths involving undefined results in NaN.
try returning an object contain an x property with the ...
How to access full source of old commit in BitBucket?
...re out or find the documentation on how to access the source of an old commit in the new Bit Bucket format. Is this even possible anymore?
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How does a “stack overflow” occur and how do you prevent it?
How does a stack overflow occur and what are the best ways to make sure it doesn't happen, or ways to prevent one, particularly on web servers, but other examples would be interesting as well?
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What does 'public static void' mean in Java?
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It's three completely different things:
public means that the method is visible and can be called from other objects of other types. Other alternatives are private, protected, package and package-private. See here for more d...
select * vs select column
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It always pulls a tuple (except in cases where the table has been vertically segmented - broken up into columns pieces), so, to answer the question you asked, it doesn't matter from a performance perspective. However, for ma...