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What are the differences between numpy arrays and matrices? Which one should I use?
...the calls to the dot function. But this argument will disappear in future, now that the @-operator is accepted for use with matrix multiplication, see PEP 465. This will need Python 3.5 and the latest version of Numpy. The matrix class might be deprecated in the far future, so better to use ndarray ...
Remove Fragment Page from ViewPager in Android
...ange of all previous fragments
baseId += getCount() + n;
}
}
Now, for example if you delete a single tab or make some change to the order, you should call notifyChangeInPosition(1) before calling notifyDataSetChanged(), which will ensure that all the Fragments will be recreated.
Why t...
Hidden Features of Java
...d it, never heard of it before.
ThreadLocals are typically not so widely known as a way to store per-thread state.
Since JDK 1.5 Java has had extremely well implemented and robust concurrency tools beyond just locks, they live in java.util.concurrent and a specifically interesting example is the j...
How to send a custom http status message in node / express?
...ype = Object.create(Error);
JSONError.prototype.constructor = JSONError;
Now, when I want to throw an Error in the code, I do:
var err = new JSONError(404, 'Uh oh! Can't find something');
next(err);
Going back to the custom error handling middleware, I modify it to:
app.use(function(err, req, ...
What is the advantage of using abstract classes instead of traits?
... performance overhead.
However, you should make this choice only if you know that the trait
in question constitutes a performance bottleneck and have evidence
that using a class instead actually solves the problem.
If you still do not know, after considering the above, then start by
mak...
Can I store images in MySQL [duplicate]
...
haha, Don't just scare people. I don't know how it was in 2011 but now DBs are so improved and store blob columns separated from the normal data, you'll never notice a change of speed. there is even streamline too
– azerafati
...
How to use JavaScript regex over multiple lines?
...d against using [^] anyway. On one hand, JavaScript is the only flavor I know that supports that idiom, and even there it's used nowhere near as often as [\s\S]. On the other hand, most other flavors let you escape the ] by listing it first. In other words, in JavaScript [^][^] matches any two ch...
How to set environment variables from within package.json
...Finally the reason it worked after you exported, is because ur variable is now available (exported) in the session, your NODE_ENV without export wasnt doing anything.
– Tarek
Feb 22 '17 at 1:32
...
C++ Const Usage Explanation
...ing something before itself.
so the answer of this problem is self-evident now.
const int* const Method3(const int* const&) const;
| | | | |
#3 #2 #3 #2 #1
...
Generating HTML email body in C#
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I didn't even knowm this existed, sheer genius it is... +1 and Accepted
– Rob
May 20 '09 at 9:15
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