Access to Member
A
1 [1,3,7,null,2,3]
2
=A1(3)
3
=A1.m(-2)
4
=A1.m@r(9)
5
=A1.pos(3)
6
=A1.pos@a(3)
7
=A1.pos(4)

Of A2~A7 the computations are as follows: