Function arrow::compute::sort_limit

pub fn sort_limit(
    values: &dyn Array,
    options: Option<SortOptions>,
    limit: Option<usize>
) -> Result<Arc<dyn Array>, ArrowError>
Expand description

Sort the ArrayRef partially.

If limit is specified, the resulting array will contain only first limit in the sort order. Any data data after the limit will be discarded.

Note: this is an unstable_sort, meaning it may not preserve the order of equal elements.

ยงExample

let array = Int32Array::from(vec![5, 4, 3, 2, 1]);

// Find the the top 2 items
let sorted_array = sort_limit(&array, None, Some(2)).unwrap();
assert_eq!(sorted_array.as_ref(), &Int32Array::from(vec![1, 2]));

// Find the bottom top 2 items
let options = Some(SortOptions {
                 descending: true,
                 ..Default::default()
              });
let sorted_array = sort_limit(&array, options, Some(2)).unwrap();
assert_eq!(sorted_array.as_ref(), &Int32Array::from(vec![5, 4]));