See a similar topic here: Remove empty items from lists
It is not working because this tool cleans empty branches, not empty items.
I read the thread above. It seems like not only me have struggled to understand what EMPTY means
This is really nice!
can you please explain this, " if(length(x)=0,0,1) "
In expression the condition must be like this
if(condition,a,b) where a or b is the result R
if length(x) = 0 than R = 0 else R = 1 >>> if(length(x) = 0,0,1)
if length(x) = 0 than R = False else R = True >>> if(length(x) = 0,False,True)