The standard library red_black_numbered_list package implements a red-black tree datastructure which both maps keys to values and also allows keys to be accessed by sequential number within the ordered keyset.
The red_black_numbered_list package implements the Numbered_List API.
The red_black_numbered_list package source code is in src/lib/src/red-black-numbered-list.pkg and is proxied by sequence.
See also: red_black_numbered_set_g from src/lib/src/red-black-numbered-set-g.pkg.
See also: sequence.The above information is manually maintained and may contain errors.