This is designed to test your knowledge of how arguments get passed to subroutines.

Instructions for Newbies:

Part A
What do you think the output of the code below is?

Part B
Give an accurate explanation for your answer.

Part C
What happens when you replace "subroutine ();" in line 7 with "&subroutine;"? Why?

Instructions for Non-Newbies:

I'm not going to provide an immediate solution or explanation for this one. Feel free to drop hints and provide general guidance as you see fit.

The Code 

1  #!/usr/bin/perl
2
3  use strict;
4
5  @_ = qw(alpha omega);
6  $_ = qw(nothing nothing);
7  subroutine ();
8 
9  sub subroutine {
10     print "In the beginning there was $_[0], in the end there will 
+be $_[1].\n";
11 }

[download]

Edit: chipmunk 2001-04-16

In reply to NEWBIE Brain Teaser #2, by nysus by nysus

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