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Reverse, Reversed
Syntax
Reverse(V:LIST):NULL
Reversed(L:LIST):NULL
where V is a variable containing a list in the first case.
Summary
reverse a list
Description
The the function Reverse
reverses the order of the elements of the
list in V, returning Null. It does *not* return the reversed list,
but instead changes L itself. The function Reversed
returns the
reversed list without changing L.
example
L := [1,2,3,4];
Reverse(L);
L; -- L has been modified
[4, 3, 2, 1]
-------------------------------
M := [1,2,3,4];
Reversed(M); -- the reversed list is returned
[4, 3, 2, 1]
-------------------------------
M; -- M has not been modified
[1, 2, 3, 4]
-------------------------------
See Also