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Why is it important to override GetHashCode when Equals method is overridden?
...n result;
}
}
As you can see it just tries to guess a good hash code based on all the fields in the class, but since you know your object's domain or value ranges you could still provide a better one.
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How do I access the request object or any other variable in a form's clean() method?
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For what it's worth, if you're using Class Based Views, instead of function based views, override get_form_kwargs in your editing view. Example code for a custom CreateView:
from braces.views import LoginRequiredMixin
class MyModelCreateView(LoginRequiredMixin, Crea...
Determine if the device is a smartphone or tablet? [duplicate]
...er a tablet to have at least a 6.5 inch screen. This is how to compute it, based on Nolf's answer above.
DisplayMetrics metrics = new DisplayMetrics();
getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);
float yInches= metrics.heightPixels/metrics.ydpi;
float xInches= metrics...
Why does MYSQL higher LIMIT offset slow the query down?
...next page. In other words, offset often needs to be calculated dynamically based on page and limit, instead of following a continuous pattern.
– Tom
Dec 28 '13 at 14:23
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browser sessionStorage. share between tabs?
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How reliable is this solution? Since it is event based, is there any chance of missing an event?
– vivek241
Oct 27 '15 at 9:48
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Has anyone actually implemented a Fibonacci-Heap efficiently?
...years back, but it was several orders of magnitude slower than using array-based BinHeaps.
4 Answers
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How do I create a datetime in Python from milliseconds?
...e 1970 and after 2038.
target_date_time_ms = 200000 # or whatever
base_datetime = datetime.datetime( 1970, 1, 1 )
delta = datetime.timedelta( 0, 0, 0, target_date_time_ms )
target_date = base_datetime + delta
as mentioned in the Python standard lib:
fromtimestamp() may raise ValueErro...
How to resume Fragment from BackStack if exists
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Reading the documentation, there is a way to pop the back stack based on either the transaction name or the id provided by commit. Using the name may be easier since it shouldn't require keeping track of a number that may change and reinforces the "unique back stack entry" logic.
Since y...
In Postgresql, force unique on combination of two columns
...dex for a and an index for c independently? Because I need to quickly find based on a sometimes, and quickly find based on c sometimes.
– CMCDragonkai
Sep 16 '19 at 13:08
add ...
Example of UUID generation using Boost in C++
... And how would you assign it to a string? Because I have a common base for every instance and I would need to concatenate UUID to a base. Thanks again!
– Nikola
Jul 15 '10 at 16:34
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