Seems exactly what I need.
v.iter().any(|x| x.contains(var))
How to exclude v[0] ? Is there somthing indexOf(..) ? I do not want to create new v1 from v..
This, or something like v[1..].iter().any(|x| x.contains(var)) would work, too, in this case.
As long as v1 is just a slice reference into v (instead of a whole new Vec copying data from v), there wouldn’t actually be any downside to this; i.e. let v1 = &v[1..]; if v1.iter().any(|x| x.contains(var)) { … } would be just as good as / equivalent to my code above.