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How to create a custom attribute in C#
...to add data to your code that might be later used by other methods/classes/etc.
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Differences between ExpandoObject, DynamicObject and dynamic
...ntation at run-time.
ExpandoObject stores underlying data in a Dictionary, etc. If you implement DynamicObject, you can store data wherever and however you like. (e.g. how you get and set the data on dispatch is entirely up to you).
In short, use DynamicObject when you want to create your OWN type...
Change one value based on another value in pandas
...eration which is overridden for series. Fancy string formatting, f-strings etc won't work here since the + applies to scalars and not 'primitive' values:
df['description'] = 'A ' + df.age.astype(str) + ' years old ' \
+ df.type + ' ' + df.animal
In [2]: df
Out[2]:
animal ...
What is the difference between graph search and tree search?
...answer is the right one for many people who find their way here via Google etc., even if it may be out of context for what Rayhanur Rahman was after.
– njlarsson
Mar 14 '13 at 15:26
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Is 'switch' faster than 'if'?
...s that correct? If so, isn't that usually slower due to more difficult prefetching/pipelining?
– user541686
Jul 24 '11 at 5:12
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What is difference between Collection.stream().forEach() and Collection.forEach()?
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The VM implementation you choose also makes a difference Hotspot/OpenJ9/etc.
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How important is the order of columns in indexes?
...u picture how the index must be traversed across, column 1, then column 2, etc...you see that lopping off most of the results in the fist pass makes the 2nd step that much faster.
Another case, if you queried on column 3, the optimizer wouldn't even use the index, because it's not helpful at all ...
How do arrays in C# partially implement IList?
... IStructuralComparable, IStructuralEquatable
{
// etc..
}
It implements System.Collections.IList, not System.Collections.Generic.IList<>. It can't, Array is not generic. Same goes for the generic IEnumerable<> and ICollection<> interfaces.
But the CLR ...
Why is “except: pass” a bad programming practice?
...nd tear on your equipment, running out of memory, collecting garbage data, etc.
If other people are asking you to complete so that they can rely on your code, I understand feeling compelled to just handle everything. But if you're willing to fail noisily as you develop, you will have the opportuni...
Fastest sort of fixed length 6 int array
...s (e.g. CUDA - being branchless there are no problems with warp divergence etc).
See also: Fast algorithm implementation to sort very small list
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