quick question, im trying to use the find method, ...

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[xii]

quick question, im trying to use the find method, but for some reason it returns

List<Test?>

and I want it to be just a List<Test>. how do I prevent the type of the elements in the list to be nullable? I want it to be an empty list worst case scenario

[Shawn]

what’s the type of the source list?

[xii]

Map<Long, List<Test>>

[xii]

so im doing

foo.map { (a, b) -> b.find( it.bar == condition)}

[Shawn]

you want a function that works on the map’s values

[xii]

can you elaborate please?

[Shawn]

So, you have this map, you want to find all the Test instances inside of it that match a certain condition, right?

[xii]

correct

[xii]

and if there are none, worst case scenario, i just want it to be an empty list of Test, not an emptyList of null

[Shawn]

you’d want something more like

foo.values.flatten().filter { it.var == condition }

[Shawn]

if your map is particularly large, you’ll want to convert to and from a Sequence<T> as needed

[Shawn]

I don’t particularly like seeing .flatten().filter() myself but there is no flatFilter() so 😅

[xii]

yeah... i prefer to just use fold

[xii]

😛

[xii]

thank you man