flowing

Turn on dataflow, so ndarrays derived from this one track its changes.

my $b = $a->flowing->slice(‘0:4’); $a->set(2, 99); print $b->at(2); # 99 - $b followed the change

Returns the ndarray, so it chains. Without flowing, a derived ndarray keeps whatever values it had when it was made.

Views built by slicing and other index arithmetic follow their parent. Results of computed expressions such as $a + $a do not yet: the expression is evaluated once and the link is not retained, so a later write to $a will not refresh them.