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kotlinlang

So I just got burned by a funny bug involving some java code that is similar to `map` in principal: The problem was that I was assumgng eager evaluation and my implementation was lazy. Now from java that's fine, since if you had written the code I just wrote, java would complain with "expected lambda param A -&gt; T, but found A -&gt; void". Because of type inference, Kotlin let T == Unit, and everything compiled just fine, and was effectively a no-op.