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kotlinlang

how come this doesn't smartcast the result of first to a String?
```val l = listOf&lt;Any&gt;("foo")
l.first { it is String}.length // unresolved reference: length```
And is there a way to get this to work with a smartcast?

I found this way:
```l.filterIsInstance&lt;String&gt;().first().length```

Yeah this is because sadly contracts aren't featured enough right now to understand what that check actually means

<https://kotlinlang.slack.com/archives/C0B8Q383C/p1590610586096000>

You might find something like this useful if you're having to do this kind of thing a fair bit :slightly_smiling_face:

<@U013JAK9TTK> technically `firstIsInstanceOrNull` :slightly_smiling_face:

Or `firstInstanceOrNull` , or `findInstance`