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When & why to use delegates? [duplicate]
...
public double eval(double x) {
return /* some_result */ ;
}
}
// etc
Then to use them in our Gauss3 method, we need to invoke it as follows:
double res1 = Gauss3(new MyFunc1(), -1, 1, 16);
double res2 = Gauss3(new MyFunc2(), 0, Math.PI, 16);
And Gauss3 needs to do the look like the fo...
Why does C++ rand() seem to generate only numbers of the same order of magnitude?
...rs between 0 and 9, 90 numbers between 10 and 99, 900 between 100 and 999, etc.
For a computationally efficient way to get a distribution with approximately logarithmic distribution, you want to right-shift your random number by a random number:
s = rand() & 31; // a random number between 0 an...
Disable a method in a ViewSet, django-rest-framework
...here is less chance of forgetting some of important methods OPTIONS, HEAD, etc
P.P.S.
by default DRF has http_method_names = ['get', 'post', 'put', 'patch', 'delete', 'head', 'options', 'trace']
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Best way to create enum of strings?
...swer. You can't have any String that wouldn't be a valid Java identifier, etc.
– Mark Peters
Oct 20 '10 at 14:29
2
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What is the purpose of the “role” attribute in HTML?
...porting specs like HTML-AAM. Some of the new HTML5 elements (dialog, main, etc.) are even based on the original ARIA roles.
http://www.w3.org/TR/wai-aria/
There are a few primary reasons to use roles in addition to your native semantic element.
Reason #1. Overriding the role where no host language e...
How do you configure Django for simple development and deployment?
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settings as well: different logging locations / intensities,
media paths, etc.
14 Answers
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What are enums and why are they useful?
... even though they don't make much sense for the singleton: ord and values, etc. (There's actually a trickier simulation where Color extends Integer that will work with switch, but it's so tricky that it even more clearly shows why enum is a better idea.)
Thread safety
Thread safety is a potential...
Unit test, NUnit or Visual studio?
...nning those
tests is slow, whether it's running a
test suite, single tests etc.
The need to keep a Test-Metadata file
which always leads to complications
when several developers are working
on it (recreating e.g. the metadata
etc.). Every other test suite doesn't
need a metadata file. It is kind of
...
Difference between string and text in rails?
...humb, use :string for short text input (username, email, password, titles, etc.) and use :text for longer expected input such as descriptions, comment content, etc.
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Android Archive Library (aar) vs standard jar
... Jar and a AAR is that AARs include
resources such as layouts, drawables etc. This makes it a lot easier
to create self-contained visual components. For example if you have
multiple apps that use the same login screen, with Jars you could
share classes but not the layout, styles, etc., you s...