using containers.Map variable to hold ArrayDeque

I'd like to set up a Map variable (hash) where each entry would hold a list - ideally, I'd like to have each entry be a java ArrayDeque because then I can push and pop items easily. I've tried:

import java.util.ArrayDeque;
fromid=containers.Map;
currentid='00323';
fromid(currentid)=ArrayDeque;
fromid(currentid).push(100);

this line gives an error Error using ==> subsref One or more output arguments not assigned during call to "push"

But, the command works

fromid(currentid)

gives

ans=
[100.0]

and

fromid(currentid).pop

returns

100

I've tried pushing and popping several values and it works, I'd like to get rid of the Error though so I can use the approach in a script.

Thanks-

Answer 1

[Walter Roberson]

I wonder... would it work to use

push(fromid(currentid),100)

??

Answer 2

[Howard Reeves]

Yes it works - thanks! HWR