SublistUnbnd( l, ind )
Sublist of a list with possibly unbound entries.
The writing of this function was prompted by the fact that if l has
some unbound entries, l{ind}
returns an error message instead of
doing what is expected (which is what this routine does).
gap> l := [ 1, , 2, , , 3 ];; gap> SublistUnbnd( l, [ 1..4 ] ); [ 1,, 2 ]
If you use l{[ 1..4 ]}
, you get an error message.
GAP 3.4.4