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Is it Pythonic to use list comprehensions for just side effects?
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It is very anti-Pythonic to do so, and any seasoned Pythonista will give you hell over it. The intermediate list is thrown away after it is created, and it could potentially be very, very large, and therefore expensive to create.
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ERROR 1396 (HY000): Operation CREATE USER failed for 'jack'@'localhost'
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I had found this suggestion and tried it earlier without success, but perhaps something else was wrong. Trying it just now again, then re-creating the situation with another user, I found that this did in fact do the trick. Of course, the formal answer ...
JavaScript OOP in NodeJS: how?
...e below is impossible)
//you should do
//method.$getAge = _super.getAge;
//and then use this.$getAge() instead of super()
method.getAge = function() {
return _super.getAge.call(this);
};
module.exports = Mouse;
Also you can consider "Method borrowing" instead of vertical inheritance. You don'...
gcc warning" 'will be initialized after'
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@Eloff In some cases (not recommendable), b and a initialisation might depend on each other. A naive user might try to alter the initialisation order to get some effect and the Warning would make it clear that it doesn't work.
– Gorpik
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Await on a completed task same as task.Result?
I'm currently reading " Concurrency in C# Cookbook " by Stephen Cleary, and I noticed the following technique:
2 Answers
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Difference between onStart() and onResume()
...nStart() . Why can't it be the onResume() is invoked after onRestart() and onCreate() methods just excluding onStart() ? What is its purpose?
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How to remove all the occurrences of a char in c++ string
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Basically, replace replaces a character with another and '' is not a character. What you're looking for is erase.
See this question which answers the same problem. In your case:
#include <algorithm>
str.erase(std::remove(str.begin(), str.end(), 'a'), str.end());
Or us...
Can I use __init__.py to define global variables?
...package. But I don't know how to do this. Suppose I have a few subpackages and each with several modules. How can I access that variable from these modules?
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How to crop an image using PIL?
I want to crop image in the way by removing first 30 rows and last 30 rows from the given image. I have searched but did not get the exact solution. Does somebody have some suggestions?
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What's the best way to iterate over two or more containers simultaneously
...ften in your data, consider using another pattern which zips two sequences and produces a range of tuples, corresponding to the paired elements:
for (auto& [a, b] : zip(containerA, containerB)) {
a = b;
}
The implementation of zip is left as an exercise for the reader, but it follows easi...