Kotlin Coroutine Confidence: asynchronous read file

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In “gallery/v14/src/main/kotlin/com/example/gallery/GetImageFromFile.kt”

  • won’t the .use always call channel.close() on exit? if so, why do you need invokeOnCancellation? or does cancellation somehow avoid the finally in the use?
  • if I wanted to iterate through the file line by line, I presume I’d call readline rather than read and otherwise it’s roughly the same?