SAMS Teach Yourself Perl in 24 Hours THIRD EDITION

Workshop

Quiz

1:	What does $ref contain after the statement $ref=\"peanuts";? Nothing. That syntax isn't valid. peanuts A reference to an anonymous scalar.
2:	What does this structure create? $a=[ { name=> "Rose", kids=> [ qw( Ted Bobby John ) ] }, { name=> "Marge", kids=>[ qw( Maggie Lisa Bart ) ] }, ]; A hash of hashes, which contains a list A list of hashes, which contains a list A list of lists, which contains another list

Answers

A1:	c. A reference can be taken to any value, not just scalar, array, and hash variables. You can take references to a number also with $ref=\100;. If you answered a, it's a good idea to try new things with a short program or in the debugger to see what they do if you're unsure.
A2:	b. This structure wasn't covered explicitly ...