Key-based indexing can be used to simulate multi-dimensional arrays.
One example of a two-dimensional array is a table. Each item in the table has a row and a column. Shelf item
keys can contain the row number and the column number separated by a separator character like period (.).
Alternatively, if each row and column has a "name", then those names can be used in the keys instead of the row
and column numbers. The following code is an example of a two-dimensional array, with the shelf item keys composed
of the row number and column number for each item, separated by a period:
global integer row global integer column global string table variable element "table" clear table set row to 0 suppress element "row" increment row set column to 0 suppress element "column" increment column set table {"%d(row).%d(column)"} to "%c"
Another way to create multi-dimensional data structures it to use records. A record field is a shelf, and you can create a shelf of a
record type, effectivly giving you shelves that can contain shelves. You can also use records to build
other kinds of data structures such as trees.