Multicolumn sort

This example shows how to perform a multicolumn sort. A multicolumn sort allows you to define what column to sort by in the event of a tie with two elements in the initial column sorted.

int float string
1 10.0 a
1 10.0 a
2 10.0 b
0 20.0 c
1 30.0 b
2 30.0 a
0 10.0 b
0 20.0 a
0 10.0 c
1 20.0 a
2 10.0 b
3 30.0 a
2 30.0 b