Automatic iteration in list and pointer

General usage
1

Hi all,

i’d like to iterate processing on each element of an existing list object, while the processing is actually updating the content of the element as in the code :

    st=struct("a",1,"b",3)
    l=list(st, st, st)
    for e=l //automatic iteration on element of the list l through e 'pointer'
        e.a=e.a+1;  //update content of the element
        e.c="newfield"; //add new field to the original element (structure)
    end
    l

and the result is leaving the original l list object unchanged.

→ l=list(st, st, st)

l = (3-elements list)

(1): [struct] with fields:
a = 1
b = 3
(2): [struct] with fields:
a = 1
b = 3
(3): [struct] with fields:
a = 1
b = 3

→ for e=l

    e.a=e.a+1;
    e.c="newfield";
end

→ l

l = (3-elements list)

(1): [struct] with fields:
a = 1
b = 3
(2): [struct] with fields:
a = 1
b = 3
(3): [struct] with fields:
a = 1
b = 3

Is there any way to apply the elementary operations (e.) on the original list l , something like a pointer still using the automatic iteration syntax ?

Thanks

David

2

for e=l will assign values only. The only way is to loop on an index, i.e.

for i=1:length(l)
   l(i).a = l(i).a+1;
   ...
end