why does `listOf true null false true filterNotNull map it ` kotlinlang #stdlib

why does `listOf(true, null, false, true).filterNo...

nkiesel

06/28/2017, 5:53 AM

why does

listOf(true, null, false, true).filterNotNull().map { !it }

work but

listOf(true, null, false, true).mapNotNull { !it }

complains about

Boolean?

Compiler should be smart enough to understand the lambda values are

Boolean

, no?

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