What is the difference between <

[#1]

Hi.  I'm curious if any can tell me what is the difference between the <<Sib and <<Next commands?  I'm designing a gui and I've noticed both commands will return the display box that immediately follows the current db.  Do they do anything differently, or can they be used interchangeably?

[#2 · Accepted solution]

There are cases where it's the same. But for the last child of a parent,

<< sib will return empty() and << next will walk to the next level:

// the same:
New window("v1", mainLB = HList box(x = V list box( tb1 = Text Box("v1"), tb2=Text Box("2") ), tb3=text box ("  3")));
wait(0);
(current report()[TextBox(1)]  << next()) << select;

New window("v2", mainLB = HList box(x = V list box( tb1 = Text Box("v2"), tb2=Text Box("2") ), tb3=text box ("  3")));
wait(0);
(current report()[TextBox(1)] << sib()) << select;

// << next walks to the next level and returns tb3
New window("v3", mainLB = HList box(x = V list box( tb1 = Text Box("v3"), tb2=Text Box("2") ), tb3=text box ("  3")));
wait(0);
(current report()[TextBox(2)]  << next()) << select;

// << sib returns Empty - and select will fail
New window("v4", mainLB = HList box(x = V list box( tb1 = Text Box("v4"), tb2=Text Box("2") ), tb3=text box ("  3")));
wait(0);
(current report()[TextBox(2)] << sib()) << select;

[#3]

Thanks @hogi .  Makes sense.