Kotlin メモ : useLines

Reader.useLines

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1. public inline fun <T> Reader.useLines(block: (Sequence<String>) -> T): T =  
2.     buffered().use { block(it.lineSequence()) }  

public inline fun <T> Reader.useLines(block: (Sequence<String>) -> T): T = buffered().use { block(it.lineSequence()) }

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1. val reader: Reader = ...  
2.   
3. reader.buffered().use {  
4.     val sequence : Sequence<String> = it.lineSequence()  
5.     ...  
6. }  

val reader: Reader = ... reader.buffered().use { val sequence : Sequence<String> = it.lineSequence() ... } ↓

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1. val reader: Reader = ...  
2.   
3. reader.useLines {  
4.     val sequence : Sequence<String> = it  
5.     ...  
6. }  

val reader: Reader = ... reader.useLines { val sequence : Sequence<String> = it ... }