In Python, I would do this:
try:
some_func()
except Exception:
handle_error()
else:
print("some_func was successful")
do_something_else() # exceptions not handled here, deliberately
finally:
print("this will be printed in any case")
I find this very elegant to read; the else
block will only be reached if no exception was thrown.
How does one do this in Kotlin? Am I supposed to declare a local variable and check that below the block?
try {
some_func()
// do_something_else() cannot be put here, because I don't want exceptions
// to be handled the same as for the statement above.
} catch (e: Exception) {
handle_error()
} finally {
// reached in any case
}
// how to handle 'else' elegantly?
I found Kotlin docs | Migrating from Python | Exceptions, but this does not cover the else
block functionality as found in Python.
Another way to use runCatching
is to use the Result
's extension functions
runCatching {
someFunc()
}.onFailure { error ->
handleError(error)
}.onSuccess { someFuncReturnValue ->
handleSuccess(someFuncReturnValue)
}.getOrDefault(defaultValue)
.also { finalValue ->
doFinalStuff(finalValue)
}
Take a look at the docs for Result
: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-result/index.html
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