Perl now not only makes it easier to use symbolic references ... be case 3. . Subroutine calls and lookups of individual array elements arise often enough that it gets cumbersome to use method 2. As a ...

Sometimes you don't want to pass the value of an array to a subroutine but rather the name of it, so that the subroutine can modify the global copy of it rather than working with a local copy. In perl ...