hello, so i was trying to find a more elegant way to write the following: `selectedChoices.mapIndexe...

# stdlib

[pavlospt]

hello, so i was trying to find a more elegant way to write the following: selectedChoices.mapIndexed { index, isSelected -> if (isSelected) index else -1 }.filter { it != -1 }. Is there a prettier way to write this ? 🙂 In short what I want to do is get the indexes from selectedChoices, which is a BooleanArray, where the value is true and then map those indexes in something different, hence the .filter { it != -1} (also not sure if I am on the right channel)

[marcinmoskala]

pavlospt:

listOf(true, true, false, true).withIndex().filter { it.value }.map { it.index }
listOf(true, true, false, true).mapIndexedNotNull { index, v -> if(v) index else null }

[pavlospt]

Will keep it mind as well 🙂 Thank you!