topic Storing object references in a list in Discussions

Storing object references in a list

aharro — Tue, 24 Feb 2026 01:35:37 GMT

Has anyone ever noticed when you store multiple object referances in a list you won't actually get the object referance....?

e.g.

Namesdefault to here(1);

dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
gb = dt << Graph Builder( Variables( X( :height ), Y( :weight ) ), Elements( Points( X, Y ), Smoother( X, Y ) ) );

list = {};
list2 = {};

Insert Into(list, {gb, "test", "test2"});

Insert Into(list2, gb);

show(list[1]);

show(list2[1]);

show(gb);

output:
list[1] = gb;
list2[1] = Graph Builder[];
gb = Graph Builder[];

The first list gives you the variable name. Not usefull to make calls on.

Re: Storing object references in a list

jthi — Tue, 24 Feb 2026 06:21:37 GMT

Use Eval List() (Scripting Guide > Data Structures > Lists in JSL Scripts > Evaluate Lists )

Names Default To Here(1);

dt = Open("$SAMPLE_DATA/Big Class.jmp");
gb = dt << Graph Builder(
	Variables(X(:height), Y(:weight)),
	Elements(Points(X, Y), Smoother(X, Y))
);

list = {};
list2 = {};

Insert Into(list, Eval List({gb, "test", "test2"}));

Re: Storing object references in a list

aharro — Wed, 25 Feb 2026 00:12:56 GMT

You made that look too easy. Thanks!