Arrays: Difference between revisions

However this will not work as intended if one tries to generalize from the syntax:

 

 

This creates a list of "height" number of references to one list object ... which is a list of width instances of the number zero. Due to the differing semantics of immutables (strings, numbers) and mutables (dictionaries, lists), a change to any one of the "rows" will affect the values in all of them. Thus we need to ensure that we initialize each row with a newly generated list.