1 *** Testing sort() : usage variations ***
3 -- Testing sort() by supplying bool value array, 'flag' value is defualt --
12 -- Testing sort() by supplying bool value array, 'flag' value is SORT_REGULAR --
21 -- Testing sort() by supplying bool value array, 'flag' value is SORT_NUMERIC --
30 -- Testing sort() by supplying bool value array, 'flag' value is SORT_STRING --