westonpace commented on issue #9325:
URL: https://github.com/apache/arrow/issues/9325#issuecomment-769971724
@joeyac is on the right track. A `ListArray` is an array that has an extra
list of offsets. So if you have a `ListArray` of struct then you can think of
it conceptually like...
```
[{a: 1}, {a: 2}, {a: 3}, {a: 4}, {a: 5}, {a: 6}] with offsets [0, 2, 4, 6]
```
This represents the two dimensional list...
```
[
[{a: 1}, {a: 2}],
[{a: 3}, {a: 4}],
[{a: 5}, {a: 6}]
]
```
The offsets tell you the start and stop of each inner list (e.g. the first
list starts at index 0 and stops at index 2). The function `value_slice`
mentioned by @joeyac will give you the nth list as an Array (the type of that
array will match the type of the list array so it will be an array of struct).
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