v		input view
cols...		column and order specifiers

Sorton is a generalized version of {sort} which sorts v according to cols.... Sorting is stable, i.e. rows will remain in the same order as in v if they are identical on the sort columns.

Apart from specifying columns, the cols... arguments can also include special "+" and "-" markers indicating that all subsequent columns are to be sorted in ascending or descending order, respectively.

set v [view {A B} def {B a B b A c A b C b}]

view $v sorton A

	A	B
0	A	c
1	A	b
2	B	a
3	B	b
4	C	b

view $v sorton - A

	A	B
0	C	b
1	B	a
2	B	b
3	A	c
4	A	b

view $v sorton A B

	A	B
0	A	b
1	A	c
2	B	a
3	B	b
4	C	b

view $v sorton A - B

	A	B
0	A	c
1	A	b
2	B	b
3	B	a
4	C	b

view $v sorton - B + A

	A	B
0	A	c
1	A	b
2	B	b
3	C	b
4	B	a

(sorton is defined in Ratcl)