Sorts seq using cmp_func.
cmp_func is passed two items of seq and should return 0 if they are equal, a negative value if the first comes before the second, and a positive value if the second comes before the first.
the function used to sort the sequence
Sorts seq using cmp_func.
cmp_func is passed two items of seq and should return 0 if they are equal, a negative value if the first comes before the second, and a positive value if the second comes before the first.