why does this output `2` and not `1`?

LastExceed

02/01/2022, 1:13 PM

why does this output

and not

todd.ginsberg

02/01/2022, 1:15 PM

Because they have different hash codes. You’ll have to override

hashcode()

as well.

👍🏻 1

Rob Elliot

02/01/2022, 1:39 PM

Fascinating, I hadn't looked at the implementation of

List<T>.distinct()

before - under the hood it's doing this:

Copy code

ArrayList(LinkedHashSet(this))

Perfectly reasonable implementation, it's just that naively I wouldn't have expected it to be using a

HashSet

for the deduplication.

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