This command sorts the elements of list,
returning a new list in sorted order. By default,
ASCII sorting is used, with the result returned
in increasing order. However, any of the following
switches may be specified before list
to control the sorting process (unique abbreviations are
accepted):
-ascii
Use string comparison with ASCII collation
order. This is the default.
-integer
Convert list elements to integers and use integer comparison.
-real
Convert list elements to floating-point values and use floating-point
comparison.
-commandcommand
Use command as a comparison command. To compare
two elements, evaluate a Tcl script consisting of
command with the two elements appended as
additional arguments. The script should return an integer
less than, equal to, or greater than zero if the first
element is to be considered less than, equal to, or greater
than the second, respectively.
-increasing
Sort the list in increasing order (smallest items first).
This is the default.
-decreasing
Sort the list in decreasing order (largest items first).