Sams Teach Yourself Perl in 21 Days, Second Edition

Workshop

The workshop provides quiz questions to help you solidify your understanding of the material covered and exercises to give you experience in using what you've learned. Try to understand the quiz and exercise answers before you go on to tomorrow's lesson.

Quiz

1:	What's a reference? What advantages do they give you?
A1:	A reference is a bit of scalar data that allows you to refer to some other bit of data in an indirect way. References allow you to pass subroutine arguments by reference (retaining the structure of multiple arrays and hashes), return discrete multiple lists, as well as create and manage nested data structures such as lists of lists.
2:	Show two ways of creating a reference to an array.
A2:	You can create a reference to an ...