Introduction
Variable members can either be specified with constant values, and expressions such as variables. This provides flexibility, but sometimes you need the flexibility to access different members in differently deep levels dynmically. This is best done with using sets which make up a part of the sequence of member names and/or index numbers or the whole one. See the following example:
var[me,you,we,they] = those people;
var[me,you,we,us] = we the people;
var[me,you,we] = all of us;
var[] = grandfather;
a[] = you;
b[] = we;
echo( var[ me, a[], b[] ] );
c[] = { you, we, us };
echo( var[me, c[]] ); // Use set to specify sub-members behind 'me'
c[] = {me} + c[];
echo( var[c[]] ); // Use set to specify all nested members
c[] = c[]{0..2}; // me, you we only
echo( var[c[]] ); // Use paramter set to specify first part of all nested members
echo( var[ {} ] ); // Empty set refers to base variable
echo( var[ {}, {me, you}, {}, {we, they} ] ); // Combinations like this one are OK
// Empty sets in the middle of the 'path' are considered as 'same location'Output 01
all of us
we the people
we the people
all of us
grandfather
those people