spektom commented on PR #7868:
URL: https://github.com/apache/arrow-rs/pull/7868#issuecomment-3035058731
Consider I'm a developer of a function that accepts an array and performs
some operations on it.
After reading existing documentation of value_data() and offsets(), these
are basic assumptions I would make:
```
// pseudocode
fn my_func(array: &StringArray) {
let first_value = array.value(0);
// expect the value_data() to start with the first value:
assert_eq!(first_value, &array.value_data()[..first_value.len()]);
// expect the first offset to be 0
assert_eq!(0, array.offsets()[0]);
}
```
These assumptions may not be fulfilled if the array is a slice of another
array.
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