What would be a `runCatching`-equivalent of the `t...

# getting-started

[Vitali Plagov]

What would be a runCatching-equivalent of the try {} finally {} code in Java?
Is it what the recover{} function does?

[Joffrey]

For Closeable resources there is a use function. Otherwise it's ad-hoc, AFAIK.

[hho]

The Kotlin equivalent of try {} finally {} in Java is try {} finally {} :
• runCatching wraps the result in, well, a Result (which try … finally doesn't do, especially not in Java, where it's not even an expression).
• recover is more like a catch (Throwable t) { } in Java, giving you the opportunity to do something with the exception and still give a Result back

[Vitali Plagov]

@Joffrey how to use this use fun?

[hho]

Example:

FileWriter("test.txt")
  .use { it.write("something") }

Even if the write fails, the FileWriter will be closed. Works with every Closable resource.

[Vitali Plagov]

Thanks, Henning. In my project the code in finally block is not used on Closable. So, probably a mis-use of the finally in my cause

[hho]

Not necessarily, it just means use is not applicable to your problem.