The key/index selector is used to return a list of all keys/indexes in the current node.
{% hint style="info" %}
This must be used in conjunction with the -m, --multiple flag.
{% endhint %}
.-$ echo '{"a":{"c": [1, 2, 3]},"b":{}}' | dasel -p json -m '.a.c.-'
"0"
"1"
"2"