Kotlin メモ : mapNotNull

https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/map-not-null.html

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1. val list = (0 until adapter.count)  
2.         .map { adapter.item(it) }  
3.         .filterNotNull()  
4.         .toList()  

val list = (0 until adapter.count) .map { adapter.item(it) } .filterNotNull() .toList() mapNotNull 使用

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1. val list = (0 until adapter.count)  
2.         .mapNotNull { adapter.item(it) }  
3.         .toList()  

val list = (0 until adapter.count) .mapNotNull { adapter.item(it) } .toList()