Column.argSort

size_t[] argSort(bool descending = false, bool nullsLast = false)

The permutation that sorts this column: stable (key, index) pair sort with the index tie-break always applied (D17), nulls first by default, floats under the total order (NaN greatest). See ddn.columnar.sort.argSortOf.

Parameters

`descending`	largest keys first
`nullsLast`	nulls after the valid entries instead of before

Returns

the sorted permutation of 0 .. length.