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Why no ICloneable?
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@AndreyShchekin: What's unclear about deep vs shallow cloning? If List<T> had a clone method, I would expect it to yield a List<T> whose items have the same identities as those in the original list, but I would expect that any in...
Is there a performance impact when calling ToList()?
...i++ has a performance impact, it slows the program for maybe a few ticks.
What does .ToList do?
When you invoke .ToList, the code calls Enumerable.ToList() which is an extension method that return new List<TSource>(source). In the corresponding constructor, under the worst circumstance, it g...
vector::at vs. vector::operator[]
...urprising results!! 5 to 10 times slower/faster! . I just don't understand what the at() method is good for.
8 Answers
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Django REST Framework: adding additional field to ModelSerializer
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I think SerializerMethodField is what you're looking for:
class FooSerializer(serializers.ModelSerializer):
my_field = serializers.SerializerMethodField('is_named_bar')
def is_named_bar(self, foo):
return foo.name == "bar"
class Meta:
mod...
Using a strategy pattern and a command pattern
...he differences between these two patterns. Hopefully it better illustrates what each encapsulates so my explanation makes more sense.
First off, the hierarchy lists the scope for which a given pattern is applicable, or the appropriate pattern to use to encapsulate some level of detail, depending on...
“Bitmap too large to be uploaded into a texture”
...want to zoom in out, and in a mobile, you should setup a system similar to what you see in google maps for example. With the image split in several pieces, and several definitions.
Or you could scale down the image before displaying it (see user1352407's answer on this question).
And also, be care...
How to calculate moving average without keeping the count and data-total?
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This is not entirely correct. What @Muis describes is an exponentially weighted moving averge, which is sometimes appropriate but is not precisely what the OP requested. As an example, consider the behaviour you expect when most of the points are in the ...
Learning Python from Ruby; Differences and Similarities
...elieve that I may need to learn Python presently. For those who know both, what concepts are similar between the two, and what are different?
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How to remove/ignore :hover css style on touch devices
...l;dr use this: https://jsfiddle.net/57tmy8j3/
If you're interested why or what other options there are, read on.
Quick'n'dirty - remove :hover styles using JS
You can remove all the CSS rules containing :hover using Javascript. This has the advantage of not having to touch CSS and being compatibl...
Is there a difference between foreach and map?
...orithms is really an implementation detail; their effect may or may not be what they return.
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