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kotlinlang

Hello, Can someone please explain the problem of using key in lazy column?
I’m facing the same problem.
```<https://stackoverflow.com/questions/74381205/removing-item-from-the-list-causes-wrong-display-in-lazycolumn>```

as the reply to the question explains, you need the items inside the `items` callback to be associated with a key. that way, when an item is removed, the LazyColumn knows what is removed.

In that example, say each `Person` had a field called id, which was unique to it.
Then you'd write
```items(people.size, key = { index -&gt; people[index].id }) { etc ...```

Someone told me there is a problem or crash while using key in lazy column, is it so?

this `key` function associates an index with an id, so when an item is removed and all the indices of the items change, the key callback now reconnects the index to the item it should contain properly

give it a go, if it crashes you then actually have an exception to google