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Determine what attributes were changed in Rails after_save callback?
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I think after_update is deprecated now? Anyway, I tried this in an after_save hook and that seemed to work fine. (The changes() hash still hasn't been reset yet in an after_save, apparently.)
– Tyler Rick
Mar 14 '13 at 5:...
Chaining multiple filter() in Django, is this a bug?
...__event=event) & Q(shiftregistrations__shifts=False)
What you can do now is to use an annotation count-filter.
In this case we count all shifts which belongs to a certain event.
qs: EventQuerySet = qs.annotate(
num_shifts=Count('shiftregistrations__shifts', filter=Q(shiftregistrations__e...
Left Align Cells in UICollectionView
... the array. You may look into the source code for its implementation.)
So now the only thing we have to do is to implement the layoutAttributesForItem(at indexPath: IndexPath) function properly. The super class UICollectionViewFlowLayout already puts the correct number of cells in each line so we o...
Programmatically Request Access to Contacts
... longer works. I believe this is a permission related problem, since Apple now requires user permission before accessing contacts (fixing this issue).
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Recursive file search using PowerShell
...ion. If you want to search for a file with a certain extension, but don't know the name of the file, you can use:
dir -Path C:\FolderName -Filter *.fileExtension -Recurse | %{$_.FullName}
Or vice versa:
dir -Path C:\FolderName -Filter FileName.* -Recurse | %{$_.FullName}
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Why is semicolon allowed in this python snippet?
...limit statements if you wish to put multiple statements on the same line.
Now, why is this allowed? It's a simple design decision. I don't think Python needs this semi-colon thing, but somebody thought it would be nice to have and added it to the language.
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Pandas percentage of total with groupby
...r
19 s ± 77.1 ms per loop
(mean ± std. dev. of 7 runs, 1 loop each)
So now we see x10 speed up on large, high cardinality datasets.
Be sure to UV these three answers if you UV this one!!
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How do I install cURL on cygwin?
... Install.
6) Open a cygwin window and type curl.exe (should be available now).
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Creating functions in a loop
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how do you know how to fix these things?
– alwbtc
Aug 18 '18 at 15:49
3
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What is the best method to merge two PHP objects?
...objB AS $var=>$value){
$objA->$var = $value;
}
That's all. You now have objA with all values from objB.
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