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It will always be more efficient to use more specific change events if . . . It will always be more efficient to use more specific change events if you can Rely on notifyDataSetChanged as a last resort RecycleView edit question: the want us to use DiffUtil docs instead of notifyDataSetChanged () because it much faster check this article on medium
Difference between scikit-learn and sklearn (now deprecated) Regarding the difference sklearn vs scikit-learn: The package "scikit-learn" is recommended to be installed using pip install scikit-learn but in your code imported using import sklearn A bit confusing, because you can also do pip install sklearn and will end up with the same scikit-learn package installed, because there is a "dummy" pypi package sklearn which will install scikit-learn for
Resort specific column in pandas dataframe - Stack Overflow I easily used df groupby ( ['assignment', 'teacher_comment_type']) count () to generate a new dataframe whereby I can see each teacher_comment_type that a given assignment ever received for any student, across the board — and also how many times that comment type was given for a certain assignment I now want to resort the count column locally for each assignment, but I'm struggling to do so
How to Sort a List lt;T gt; by a property in the object - Stack Overflow @staafl We are ordering a list of object references, not duplicating the objects themselves as far as I'm aware While this does double the memory used by the list of references it's not as bad as actually duplicating all of the objects themselves so in most scenarios outside of those where we are dealing with huge data sets and holding them in memory is already an issue, then it should suffice
Display the resortid, name of the resort ,booking count and the total . . . count(*) totalbooking , sum(b totalcharge) as totalamount from resort r inner join booking b on b resortid = r resortid group by r resortid, r resortname order by r resortid; Note that table aliases make the query easier to write and read This gives you one row per resort, with the total number of bookings and the sum of totalcharge