grade down

Grade down

>x

The grade down primitive is used to get the indices of an array that would sort it in descending order.

Since grading is not the same as sorting, a general idiom used to sort arrays is {x(>x)} or other equivalent.

Grade primitives generally use a stable sort, which means that an descending grade may not always be the inverse of an ascending grade.

For numeric arrays:

 >34 -1 0 67 32767
4 3 0 2 1

Grading of string arrays largely depends upon the implementation, as shown in grade up.