Comments (2)
This is fairly specialized.
Removing duplicates makes sense.
That's what toSet
does.
Counting occurrences makes some sense, of you want to account for all occurrences, but want to handle sale the dollars together, instead of in the original list order. Can use groupBy
for that.
Handling only the ones that have duplicates, and not the rest, seems more uncommon.
I'd just tell people to do
list.groupBy(id).values.where((e) => e.length > 1)
from collection.
This is a pretty decent solution!
But hard to discover. Maybe, I'll submit an example in documentation for the groupBy
function :D
from collection.
Related Issues (20)
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- [Feature] Add a BTree implementation HOT 2
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- ListExtensions.slice: infinite recursion when calling slice on a ListSlice<T> declared as List<T> HOT 1
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from collection.