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Why is the order in dictionaries and sets arbitrary?
...tand how looping over a dictionary or set in python is done by 'arbitrary' order.
6 Answers
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What is a patch in git version control?
...ave two versions of the file (or even the whole repository) checked out in order to compare them. Doesn't sound that good, does it? So git takes care of all of the hard work for you - it compares your local file with what is there in the repository you are working with, and can show it to you as a "...
How to do SELECT COUNT(*) GROUP BY and ORDER BY in Django?
...t
Transaction.objects.all().values('actor').annotate(total=Count('actor')).order_by('total')
values() : specifies which columns are going to be used to "group by"
Django docs:
"When a values() clause is used to constrain the columns that are
returned in the result set, the method for evaluating an...
What are the pros and cons to keeping SQL in Stored Procs versus Code [closed]
...will basically do nothing but the following:
(Pseudocode)
Function createOrder(Order yourOrder)
Begin
Call SP_createOrder(yourOrder)
End
So in the end you have your middle tier running on this very cool 4 Server cluster each of them equipped with 16 CPUs and it will actually do nothing at all...
When and why JPA entities should implement Serializable interface?
...not expired in the mean time) when the application reload is completed.
In order to successfully restore the state of session attributes, all such attributes MUST implement the java.io.Serializable interface.
So, if the entity is stored in the HttpSession, it should implement Serializable.
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Create table (structure) from existing table
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I thought 1=2 would be just a weird wrong argument in order to avoid copying data.
– Arthur Zennig
Sep 28 '16 at 10:21
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How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throw
...se they use annotations (e.g. PrettyFaces), you might need to add explicit ordering via web.xml. See How to define servlet filter order of execution using annotations in WAR
Only if you're using the PrimeFaces file upload filter: There's another Filter in your webapp which runs before the PrimeFaces...
Converting a list to a set changes element order
Recently I noticed that when I am converting a list to set the order of elements is changed and is sorted by character.
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Setting the zoom level for a MKMapView
... very simple and does the trick. Use MKCoordinateRegionMakeWithDistance in order to set the distance in meters vertically and horizontally to get the desired zoom. And then of course when you update your location you'll get the right coordinates, or you can specify it directly in the CLLocationCoord...
When do we need curly braces around shell variables?
...assigned without $ and without {}. You have to use
var=10
to assign. In order to read from the variable (in other words, 'expand' the variable), you must use $.
$var # use the variable
${var} # same as above
${var}bar # expand var, and append "bar" too
$varbar # same as ${varbar}, i.e ...